Does Smartlet work with Formex watches?

Yes. Formex references from 18mm to 22mm lug width are natively supported by Smartlet One.

Will Smartlet affect the Formex suspended movement system?

No. Smartlet attaches via spring-bar slots at the lug ends. The 4-point suspension system is completely unaffected.

Which Formex models have guides?

The Essence Leggera has a full reference table covering 166 references across 39mm, 41mm, and 43mm case sizes.

¿Smartlet daña o modifica mi reloj mecánico?

No. Smartlet reemplaza tu correa de reloj estándar utilizando el sistema de pasador de resorte existente. No realiza ninguna modificación permanente en la caja, asas o esfera del reloj. El proceso es completamente reversible en segundos. Tu reloj mecánico no se ve afectado y puede usarse de forma independiente en cualquier momento reinstalando su correa original. Smartlet está diseñado con tolerancias de relojero y probado con el mismo cuidado que se dedica a los relojes con los que se empareja.

Wear a smartwatch with your Formex

Smartlet One is compatible with all Formex Essence and Element references using 20mm to 22mm lug widths, natively supported with no adapter. Installation uses the standard spring-bar system - no modification to the watch, fully reversible in seconds.

Explore

Forbes · CNET

250+ clients

35+ countries

CES 2026 · Lépine 2025

Patented

Formex compatibility

Wear a smartwatch with your Formex

In short Smartlet One is compatible with all Formex Essence and Element references using 20mm to 22mm lug widths, natively supported with no adapter. Installation uses the standard spring-bar system - no modification to the watch, fully reversible in seconds.

Formex built a suspended movement system - four springs isolate the calibre from the case, absorbing shock before it reaches the movement. It is an engineering choice that costs more to produce and results in a measurably more accurate watch under daily wear. Formex owners chose on merit. Smartlet One approaches compatibility the same way: no adapter, no modification, standard spring bars, reversible in seconds.

Wear yours How it works

The problem

Choosing between health data and horological heritage every morning.

The solution

Smartlet One replaces your Formex's strap via the standard spring-bar system and positions your smartwatch on the same wrist. Both watches run simultaneously, with no modification to the watch and full reversibility in seconds.

Brand

Formex

Lug widths

18.0mm / 20.0mm / 22.0mm

Iconic models

1covered

Compatibility

Full range

Choose your edition

One mechanism. Three personalities.

Every Smartlet One includes the dedicated adapter for your wearable. Pick the finish that matches your style.

Smartlet One, Classic

€299,00

4.9 (14)

The one that goes with everything you already own.

Material SS316L stainless steel
Weight ~100g
Compatible with Rolex, Omega, Seiko + 100 more

Buy now

For the explorer

Smartlet One, Shadow

€399,00

4.9 (14)

Stealth. Switch in seconds, leave no trace.

Material SS316L steel, black PVD
Weight ~100g
Compatible with Rolex, Omega, Seiko + 100 more

Buy now

Connoisseur

For the performance addict

Smartlet One, Titanium

€549,00

4.9 (14)

Aerospace-grade. 40% lighter than steel.

Material Grade 2 titanium
Weight ~60g (vs ~100g steel)
Compatible with Rolex, Omega, Seiko + 100 more

Buy now

Compatibility

Formex models supported

Formex Essence Leggera

18mm / 20mm / 22mm

Other Formex references

16 model families. Expand any group to see variants, references, and specifications.

Active

22mm6 refs+

ReferenceMaterialDialLugSmartlet

AS300-TI-2003TitaniumGrey22mmCompatible

AS400-TI-2004TitaniumGrey22mmCompatible

AS100-2000SteelBlack22mmCompatible

AS200-2001Steel/Suspension FrameSilver22mmCompatible

AS300-2002-CARBCarbon/SteelBlack22mmCompatible

AS450-CARB-2005Carbon/GreyBlack22mmCompatible

Atelier

20mm / 22mm26 refs+

ReferenceMaterialDialLugSmartlet

UNQ-FMX-REBWhite GoldBlue Enamel22mmCompatible

UNQ-FMX-JDYellow GoldJade22mmCompatible

UNQ-FX-CH-EMR01White GoldEmerald22mmCompatible

UNQ-FX-BLENWhite GoldBlue Enamel20mmCompatible

UNQ-FX-ES-JD01White GoldJade20mmCompatible

UNQ-FX-RE-DRG01Yellow GoldEngraved Dragon22mmCompatible

UNQ-FMX-FDZBronzeBrown22mmCompatible

UNQ-FMX-ENAM-BLK-2024White GoldBlack Enamel Wave20mmCompatible

UNQ-FMX-ENAM-BLUE-2024White GoldBlue Enamel20mmCompatible

UNQ-FMX-SILDRG-2024White GoldHand-Engraved Silver Dragon20mmCompatible

UNQ-FMX-METEOR-BLU-2025White GoldBlue Meteorite20mmCompatible

UNQ-FMX-DAMAS-2024Damascus TitaniumGrey Patterned22mmCompatible

UNQ-FMX-CFROST-2024Forged CarbonFrost Grey22mmCompatible

UNQ-FMX-CARBW-2024Forged CarbonBlack Wave22mmCompatible

UNQ-FX-FLD-MET01SteelMeteorite20mmCompatible

UNQ-FX-DAM-GRNDamascus SteelGreen22mmCompatible

UNQ-FMX-RGLPlatinumIce Blue22mmCompatible

UNQ-FX-REDRose GoldRed Enamel22mmCompatible

UNQ-FMX-SRRRose GoldRuby Meteorite22mmCompatible

UNQ-FMX-METRose GoldMeteorite22mmCompatible

UNQ-FX-RE-SAP01SapphireTransparent Diver22mmCompatible

UNQ-FMX-SAPSapphireTransparent22mmCompatible

UNQ-FX-ES-SKS01SapphireSkeleton20mmCompatible

UNQ-FX-RE-RUB01Rose GoldRuby22mmCompatible

UNQ-FMX-GOLD-SKEL-2025Red GoldSkeleton Engraved22mmCompatible

UNQ-FMX-LAVA-2025Red GoldLava Enamel22mmCompatible

Chronograph

22mm30 refs+

ReferenceMaterialDialLugSmartlet

CH-45-BK01SteelBlack22mmCompatible

CH-45-BL01SteelBlue22mmCompatible

CH-45-BG01SteelBurgundy22mmCompatible

CH-45-CB01SteelCobalt22mmCompatible

PCH-45-GL01Rose GoldBlue22mmCompatible

CH-45-GN01SteelGreen22mmCompatible

CH-45-GR01SteelGrey22mmCompatible

CH-45-IB01SteelIce Blue22mmCompatible

FX-CHM-BK01SteelBlack22mmCompatible

FX-CHM-BL01SteelBlue22mmCompatible

FX-CHM-GN01SteelGreen22mmCompatible

FX-CHM-GR01SteelGrey22mmCompatible

FX-CHM-BR01SteelBrown22mmCompatible

FX-CHM-IB01SteelIce Blue22mmCompatible

FX-CHM-CB01SteelCobalt22mmCompatible

FX-CHM-PP01SteelPurple22mmCompatible

FX-CHM-RD01SteelRed22mmCompatible

FX-CHM-SD01SteelSand22mmCompatible

FX-CHMS-BK01SteelBlack22mmCompatible

FX-CHMS-BL01SteelBlue22mmCompatible

FX-CHMS-GN01SteelGreen22mmCompatible

FX-CHMS-GR01SteelGrey22mmCompatible

FX-CHMS-BR01SteelBrown22mmCompatible

FX-CHMS-IB01SteelIce Blue22mmCompatible

FX-CHMS-CB01SteelCobalt22mmCompatible

FX-CHMS-PP01SteelPurple22mmCompatible

FX-CHMS-RD01SteelRed22mmCompatible

FX-CHMS-SD01SteelSand22mmCompatible

CH-45-PP01SteelPurple22mmCompatible

CH-45-SD01SteelSand22mmCompatible

Diver

22mm10 refs+

ReferenceMaterialDialLugSmartlet

FX-DIV500-BK01SteelBlack22mmCompatible

FX-DIV500-BL01SteelBlue22mmCompatible

FX-DIV500-GN01SteelGreen22mmCompatible

FX-DIV500-GR01SteelGrey22mmCompatible

FX-DIV500-BR01SteelBrown22mmCompatible

FX-DIV500-IB01SteelIce Blue22mmCompatible

FX-DIV500-CB01SteelCobalt22mmCompatible

FX-DIV500-PP01SteelPurple22mmCompatible

FX-DIV500-RD01SteelRed22mmCompatible

FX-DIV500-SD01SteelSand22mmCompatible

Essence

20mm / 22mm99 refs+

ReferenceMaterialDialLugSmartlet

0330.1.6620.100Stainless SteelBlue20mmCompatible

0330.1.6220.100SteelBlack20mmCompatible

0330.1.6020.100SteelWhite20mmCompatible

0330.1.C24.100SteelBlue/Silver20mmCompatible

0330.1.C24.200SteelGreen20mmCompatible

0330.1.C24.300SteelBrown20mmCompatible

0330.1.C24.400SteelYellow20mmCompatible

0330.1.6320.100SteelCopper20mmCompatible

0330.1.6420.100SteelGreen20mmCompatible

0330.1.C24.500SteelPurple20mmCompatible

0330.1.6120.100SteelGrey20mmCompatible

0330.1.6720.100SteelPurple20mmCompatible

0330.1.6820.100SteelTurquoise20mmCompatible

0330.1.6620.200SteelBlue Gradient20mmCompatible

0330.1.6920.100SteelSalmon20mmCompatible

FX-ES39-BL01Stainless SteelBlue20mmCompatible

FX-ES39-GR01Stainless SteelGrey20mmCompatible

FX-ES39-GD01Stainless SteelDégradé Grey20mmCompatible

FX-ES39-WH01Stainless SteelWhite20mmCompatible

FX-ES39-BK01Stainless SteelBlack20mmCompatible

FX-ES39-GN01Stainless SteelGreen20mmCompatible

ESS41-MET-BLU-2023Stainless SteelBlue Meteorite20mmCompatible

ESS41-MET-GRY-2023Stainless SteelGrey Meteorite20mmCompatible

ESS41-COPGRAD-2024Stainless SteelCopper Gradient20mmCompatible

ESS41-TEAL-2024Stainless SteelTeal Gradient20mmCompatible

ESS41-LILAC-2024SteelLilac20mmCompatible

FX-ES41-WH01Stainless SteelWhite20mmCompatible

FX-ES41-GM01Stainless SteelGamaret (Wine-Red)20mmCompatible

FX-ES41-AW01Stainless SteelArctic White20mmCompatible

FX-ES41-BL01Stainless SteelBlue20mmCompatible

0331.1.6220.900Black DlcBlack22mmCompatible

0331.1.6220.100SteelBlack22mmCompatible

0331.1.6620.100SteelBlue22mmCompatible

0331.1.6020.100SteelWhite22mmCompatible

0331.1.6120.100SteelSilver22mmCompatible

0331.1.6320.200SteelBrown22mmCompatible

0331.1.6420.200SteelGreen22mmCompatible

0331.1.6120.200SteelGrey22mmCompatible

0331.1.6820.100SteelIce Blue22mmCompatible

0331.1.6920.100SteelTurquoise22mmCompatible

ES-41-BK01SteelBlack22mmCompatible

ES-41-BL01SteelBlue22mmCompatible

ESS43-BLK-2018Stainless SteelBlack22mmCompatible

ESS43-BLU-2018Stainless SteelBlue22mmCompatible

ES-39-BL01Stainless SteelBlue20mmCompatible

ES-39-BK01SteelBlack20mmCompatible

ES-39-SL01SteelSilver20mmCompatible

ES-41-GN01SteelGreen22mmCompatible

ES-41-GR01SteelGrey22mmCompatible

ES-41-SL01SteelSilver22mmCompatible

ESS43-SLV-2019Stainless SteelSilver22mmCompatible

ES-39-GN01SteelGreen20mmCompatible

ES-39-GR01SteelGrey20mmCompatible

ES-41-BR01SteelBrown22mmCompatible

ESS43-GRN-2020Stainless SteelGreen22mmCompatible

ES-39-BR01SteelBrown20mmCompatible

ES-41-BG01SteelBurgundy22mmCompatible

ES-41-IB01SteelIce Blue22mmCompatible

ESS41-BLK-2021Stainless SteelBlack20mmCompatible

ESS41-BLU-2021Stainless SteelBlue20mmCompatible

ESS41-WHT-2021Stainless SteelWhite20mmCompatible

ES-39-IB01SteelIce Blue20mmCompatible

ES-39-SM01SteelSalmon20mmCompatible

ES-41-PB01SteelPastel Blue22mmCompatible

ESS41-COP-2022Stainless SteelCopper20mmCompatible

ES-39-CB01SteelCobalt20mmCompatible

ES-41-PP01SteelPurple22mmCompatible

ESS41-PUR-2023Stainless SteelPurple20mmCompatible

ESS41-SAND-2023Stainless SteelSand20mmCompatible

ESS41-GMT-2023Stainless SteelBlack/Gmt20mmCompatible

ES-39-PP01SteelPurple20mmCompatible

ESS41-GLD-2024Gold PvdChampagne20mmCompatible

ESS41-FRST-2024Stainless SteelForest Green20mmCompatible

ESS41-LIME-2024Stainless SteelLime Green20mmCompatible

ESS41-SKY-2024Stainless SteelSky Blue20mmCompatible

ESS41-DENIM-2025SteelDenim Blue20mmCompatible

ESS41-ROSE-2025SteelRose Gradient20mmCompatible

ESS41-LV-2025SteelLavender20mmCompatible

FX-ES41-LTD-CP01SteelCopper20mmCompatible

FX-ES41-LTD-IC01SteelIce Blue20mmCompatible

FX-ES41-LTD-JD01SteelJade Green20mmCompatible

FX-ES41-LTD-RB01SteelRuby Red20mmCompatible

FX-ES41-LTD-SKS01SapphireSkeleton20mmCompatible

FX-ES41-LTD-EM01SteelEmerald20mmCompatible

ESS39-BLK-2020Stainless SteelBlack20mmCompatible

ESS39-BLU-2020Stainless SteelBlue20mmCompatible

ESS39-SLV-2021Stainless SteelSilver20mmCompatible

ESS39-GRN-2022Stainless SteelGreen20mmCompatible

ESS39-COP-2023Stainless SteelCopper20mmCompatible

ESS39-PUR-2023Stainless SteelPurple20mmCompatible

ESS39-PET-2024Stainless SteelPetrol Blue20mmCompatible

ESS39-CHOC-2024SteelChocolate Brown20mmCompatible

ESS39-ICEBL-2024SteelIce Blue20mmCompatible

ESS39-JADE-2024SteelJade Green20mmCompatible

ESS39-YLW-2024SteelYellow20mmCompatible

ESS39-CORAL-2025SteelCoral Orange20mmCompatible

ESS39-EMR-2025SteelEmerald Green20mmCompatible

ESS39-RSUN-2025SteelRose Sunburst20mmCompatible

ESS39-WAVE-2025SteelSteel Wave Texture20mmCompatible

Field

18mm / 20mm / 22mm100 refs+

ReferenceMaterialDialLugSmartlet

FIELD34-BLK-2024Stainless SteelBlack18mmCompatible

FIELD34-BLU-2024Stainless SteelBlue18mmCompatible

FIELD34-CORAL-2024Stainless SteelCoral18mmCompatible

FIELD34-CRM-2024Stainless SteelCream18mmCompatible

FIELD34-IND-2024Stainless SteelIndigo Blue18mmCompatible

FIELD34-LILAC-2024Stainless SteelLilac18mmCompatible

FIELD34-MINT-2024Stainless SteelMint Green18mmCompatible

FIELD34-PUR-2024Stainless SteelPurple18mmCompatible

FIELD34-SAND-2024Stainless SteelSand18mmCompatible

FIELD34-SLV-2024Stainless SteelSilver18mmCompatible

FIELD34-YLW-2024Stainless SteelYellow18mmCompatible

FIELD34-AMT-2025Stainless SteelArctic Mint18mmCompatible

FIELD34-NVY-2025Stainless SteelNavy18mmCompatible

FIELD34-ORGPOP-2025Stainless SteelOrange Pop18mmCompatible

FIELD34-SS-2025Stainless SteelSandstorm18mmCompatible

FIELD34-CRSN-2025SteelCoral Sun18mmCompatible

FIELD34-ECL-2025SteelDark Blue18mmCompatible

FIELD34-LAV2-2025SteelLavender Ii18mmCompatible

FIELD34-SPGRN-2025SteelSpring Green18mmCompatible

FD-36-BK01TitaniumBlack20mmCompatible

FD-36-BL01TitaniumBlue20mmCompatible

FD-36-GN01TitaniumGreen20mmCompatible

FD-36-GR01TitaniumGrey20mmCompatible

FD-36-SL01TitaniumSilver20mmCompatible

FD-36-BR01TitaniumBrown20mmCompatible

FD-36-IB01TitaniumIce Blue20mmCompatible

FD-36-CB01TitaniumCobalt20mmCompatible

FD-36-CR01TitaniumCoral20mmCompatible

FD-36-PP01TitaniumPurple20mmCompatible

FIELD39-ARMY-2024Titanium/SteelArmy Green20mmCompatible

FIELD39-DSR-2024Titanium/SteelDesert Rose20mmCompatible

FIELD39-MID-BLU-2024Titanium/SteelMidnight Blue20mmCompatible

FIELD39-TAC-BLK-2024Titanium/SteelBlack Tactical20mmCompatible

0355.2.6220.000TitaniumBlack20mmCompatible

0355.2.6620.000TitaniumBlue20mmCompatible

0355.2.6420.000TitaniumGreen20mmCompatible

0355.2.6120.000TitaniumGrey20mmCompatible

0355.2.6820.000TitaniumAqua20mmCompatible

0355.2.3020.000TitaniumCobalt20mmCompatible

0355.2.6920.000TitaniumSalmon20mmCompatible

0355.2.6020.000TitaniumWhite20mmCompatible

0355.2.0920.000TitaniumDesert Beige20mmCompatible

0355.2.2720.000TitaniumEmerald Green20mmCompatible

0355.1.6120.000TitaniumGrey20mmCompatible

0355.1.6320.000TitaniumBrown20mmCompatible

0355.1.6820.000TitaniumSand20mmCompatible

0355.1.7020.000TitaniumIce Blue20mmCompatible

0355.1.6920.000TitaniumCoral20mmCompatible

0355.1.6620.000TitaniumBlue20mmCompatible

0355.1.6220.000TitaniumBlack20mmCompatible

FD-41-BK01TitaniumBlack22mmCompatible

FD-41-BL01TitaniumBlue22mmCompatible

0355.1.6420.000TitaniumGreen Sage20mmCompatible

FD-41-GN01TitaniumGreen22mmCompatible

FD-41-GR01TitaniumGrey22mmCompatible

0355.1.6520.000TitaniumOlive20mmCompatible

FD-41-IB01TitaniumIce Blue22mmCompatible

0355.1.4120.000TitaniumViolet20mmCompatible

FD-41-PP01TitaniumPurple22mmCompatible

FD-41-SD01TitaniumSand22mmCompatible

FD-41-CB01TitaniumCobalt22mmCompatible

FD-41-CR01TitaniumCoral22mmCompatible

FD-41-OL01TitaniumOlive22mmCompatible

FX-FLD41-GR01TitaniumGrey20mmCompatible

FX-FLD41-SD01TitaniumSand20mmCompatible

FX-FLD41-BK01TitaniumBlack20mmCompatible

FX-FLD41-BL01TitaniumBlue20mmCompatible

FX-FLD41-BR01TitaniumBrown20mmCompatible

FX-FLD41-CB01TitaniumCobalt20mmCompatible

FX-FLD41-GN01TitaniumGreen20mmCompatible

FX-FLD41-IB01TitaniumIce Blue20mmCompatible

FX-FLD41-PP01TitaniumPurple20mmCompatible

FX-FLD41-RD01TitaniumRed20mmCompatible

FIELD39-BLK-2022Titanium/SteelBlack20mmCompatible

FIELD39-SAND-2022Titanium/SteelSand20mmCompatible

FIELD39-BURG-2023Titanium/SteelBurgundy20mmCompatible

FIELD39-GRN-2023Titanium/SteelGreen20mmCompatible

FIELD39-LIME-2023Titanium/SteelLime Green20mmCompatible

FIELD39-PETROL-2023Titanium/SteelPetrol Blue20mmCompatible

FIELD39-SLT-2023Titanium/SteelSlate Grey20mmCompatible

FIELD39-ARCW-2024Titanium/SteelArctic White20mmCompatible

FIELD39-GPH-2024Titanium/SteelGraphite20mmCompatible

FIELD39-NVY-2024Titanium/SteelNavy Blue20mmCompatible

FIELD39-OLV-2024Titanium/SteelOlive Green20mmCompatible

FIELD39-PUR-2024Titanium/SteelPurple20mmCompatible

FIELD39-TCO-2024Titanium/SteelTerracotta20mmCompatible

FIELD39-BRZSD-2025Titanium/SteelBronze/Sand20mmCompatible

FIELD39-DTL-2025Titanium/SteelDeep Teal20mmCompatible

FIELD39-JFOG-2025Titanium/SteelJade Fog Green20mmCompatible

FIELD39-NOR-2025Titanium/SteelNordic Blue20mmCompatible

FX-FLD39-BK01TitaniumBlack20mmCompatible

FX-FLD39-BL01TitaniumBlue20mmCompatible

FX-FLD39-GR01TitaniumGrey20mmCompatible

FX-FLD39-SD01TitaniumSand20mmCompatible

FX-FLD39-BR01TitaniumBrown20mmCompatible

FX-FLD39-GN01TitaniumGreen20mmCompatible

FX-FLD39-IB01TitaniumIce Blue20mmCompatible

FX-FLD39-CB01TitaniumCobalt20mmCompatible

FX-FLD39-PP01TitaniumPurple20mmCompatible

FX-FLD39-RD01TitaniumRed20mmCompatible

Formex

22mm4 refs+

ReferenceMaterialDialLugSmartlet

4SPD-CHR-2008SteelBlack/Red22mmCompatible

4SPD-GMT-2009SteelBlack Gmt22mmCompatible

4SPD-YLW-2010SteelYellow Racing22mmCompatible

4SPD-SKEL-2010SteelSkeleton22mmCompatible

Motorsport

22mm10 refs+

ReferenceMaterialDialLugSmartlet

MS-CHR-RED-2008SteelRed Racing22mmCompatible

MS-CHR-YLW-2009SteelYellow Racing22mmCompatible

MS-GMT-BKOR-2010SteelBlack/Orange Gmt22mmCompatible

MS-GMT-BLU-2010SteelBlue Gmt22mmCompatible

V6-TI-2004TitaniumBlack22mmCompatible

V6-BKOR-2004SteelBlack/Orange22mmCompatible

V6-CARB-2005Carbon/SteelBlack/Red22mmCompatible

N6-BLU-2005SteelBlue Dial22mmCompatible

V8-CHR-2006SteelBlack22mmCompatible

V8-CHR-BLU-2007SteelBlue Racing22mmCompatible

Pilot

22mm48 refs+

ReferenceMaterialDialLugSmartlet

0400.2.6220.000TitaniumBlack22mmCompatible

0400.2.6620.000TitaniumBlue22mmCompatible

0400.2.6320.000TitaniumBrown22mmCompatible

0400.2.6120.000TitaniumGrey22mmCompatible

0400.2.6020.000TitaniumWhite22mmCompatible

0400.1.6220.000SteelBlack22mmCompatible

0400.1.6620.000SteelBlue22mmCompatible

0400.1.6220.400SteelBlack22mmCompatible

0400.1.6120.000SteelGrey22mmCompatible

0400.1.6020.000SteelWhite22mmCompatible

0400.1.6620.400SteelBlue22mmCompatible

0400.1.6020.400SteelWhite22mmCompatible

0400.1.6320.000SteelBrown22mmCompatible

0400.1.6120.400SteelGrey22mmCompatible

0400.1.6320.400SteelBrown22mmCompatible

FX-PLT-BK01SteelBlack22mmCompatible

FX-PLT-BL01SteelBlue22mmCompatible

FX-PLT-GN01SteelGreen22mmCompatible

FX-PLT-GR01SteelGrey22mmCompatible

FX-PLT-BR01SteelBrown22mmCompatible

FX-PLT-IB01SteelIce Blue22mmCompatible

FX-PLT-CB01SteelCobalt22mmCompatible

FX-PLT-PP01SteelPurple22mmCompatible

FX-PLT-RD01SteelRed22mmCompatible

FX-PLT-SD01SteelSand22mmCompatible

PL-44-BK01SteelBlack22mmCompatible

PL-44-BL01SteelBlue22mmCompatible

PL-44-BG01SteelBurgundy22mmCompatible

PILOT-CHR-DLC-2007Black DlcBlack22mmCompatible

PILOT-CHR-RED-2008Black PvdRed/Black22mmCompatible

PILOT-CHR-BLK-2006Stainless SteelBlack22mmCompatible

PILOT-CHR-SL-2007Stainless SteelSilver22mmCompatible

PILOT-CHR-BLU2-2007SteelBlue22mmCompatible

PILOT-CHR-GRN-2008SteelGreen22mmCompatible

PL-44-CB01SteelCobalt22mmCompatible

PILOT-GMT-YLW-2009Stainless SteelBlack/Yellow22mmCompatible

PILOT-GMT-BLBL-2009SteelBlack/Blue Gmt22mmCompatible

0400.1.6220.300SteelBlack22mmCompatible

0400.1.6620.300SteelBlue22mmCompatible

0400.1.6020.300SteelWhite22mmCompatible

0400.1.6320.300SteelBrown22mmCompatible

0400.1.6120.300SteelGrey22mmCompatible

PL-44-GN01SteelGreen22mmCompatible

PL-44-GR01SteelGrey22mmCompatible

PL-44-IB01SteelIce Blue22mmCompatible

PL-44-JD01SteelJade22mmCompatible

PL-44-PP01SteelPurple22mmCompatible

PL-44-SM01SteelSalmon22mmCompatible

Prototype

18mm / 20mm / 22mm17 refs+

ReferenceMaterialDialLugSmartlet

PROTO-ESS41-TI-2022TitaniumGrey Proto20mmCompatible

PROTO-ESS-GMT-TI-2024TitaniumGrey Proto20mmCompatible

P-ESS-CARB-SK-2024CarbonGrey Skeleton20mmCompatible

P-FMX-EOILSteelOil Black22mmCompatible

P-FX-ES-SAP01SapphireTransparent20mmCompatible

P-FMX-FLTitaniumFull Lume22mmCompatible

P-FX-FLD-EN01SteelWhite Enamel20mmCompatible

PROTO-LEG38-CARB-2025Carbon CompositeGrey Proto20mmCompatible

P-REEF-BRZ-2023BronzeGrey Proto22mmCompatible

P-FMX-RTITitaniumGrey22mmCompatible

PROTO-REEF-TIDE-2025TitaniumBlack Proto22mmCompatible

PROTO-REEF-SKEL-2023SteelSkeleton Proto22mmCompatible

PROTO-REEF-CER-PUR-2024Steel/CeramicPurple Proto22mmCompatible

PROTO-REEF36-2025SteelBlack Proto18mmCompatible

PROTO-REEF-CERMNT-2025CeramicMint Proto22mmCompatible

P-FX-RE-FC01Carbon/SteelCarbon Black22mmCompatible

PROTO-REEF-GMT-ARC-2025SteelArctic Proto22mmCompatible

Racer

22mm5 refs+

ReferenceMaterialDialLugSmartlet

RACER-CHR-BLU-2008Stainless SteelBlue22mmCompatible

RACER-CHR-ORG-2008Stainless SteelOrange Racing22mmCompatible

RACER-GMT-BLK-2009Stainless SteelBlack Gmt22mmCompatible

RACER-SKEL-BLK-2007Stainless SteelSkeleton Black22mmCompatible

RACER-SKEL-BLU-2008Stainless SteelSkeleton Blue22mmCompatible

Reef

20mm / 22mm130 refs+

ReferenceMaterialDialLugSmartlet

REEF39-PROT-2023Stainless SteelBlack Proto20mmCompatible

REEF39-PROT-BLU-2024Stainless SteelBlue Proto20mmCompatible

REEF39-BLK-2024Stainless SteelBlack20mmCompatible

REEF39-BLU-2024Stainless SteelBlue20mmCompatible

REEF39-GRN-2024Stainless SteelGreen20mmCompatible

REEF39-WHT-2024Stainless SteelWhite20mmCompatible

FX-RE42-BZ-GN01BronzeGreen22mmCompatible

FX-RE42-BZ-BL01BronzeBlue22mmCompatible

FX-RE42-BZ-GR01BronzeGrey22mmCompatible

FX-RE42-BZ-BK01BronzeBlack22mmCompatible

FX-RE42-GMT-BZ-BK01BronzeBlack22mmCompatible

FX-RE42-BK01Stainless SteelTitanium Bezel22mmCompatible

FX-RE42-BL01Stainless SteelTitanium Bezel22mmCompatible

FX-RE42-GN01Stainless SteelTitanium Bezel22mmCompatible

FX-RE42-WH01Stainless SteelTitanium Bezel22mmCompatible

0350.1.6220.100SteelBlack22mmCompatible

0350.1.6620.100SteelBlue22mmCompatible

0350.1.6420.100SteelGreen22mmCompatible

FX-RE42-GR01Stainless SteelTitanium Bezel22mmCompatible

FX-RE42-SD01Stainless SteelTitanium Bezel22mmCompatible

0350.1.6120.100SteelGrey22mmCompatible

0350.1.6020.100SteelWhite22mmCompatible

0350.1.6720.100SteelOrange22mmCompatible

REEF42-ABYSS-2023Stainless SteelAbyss Blue22mmCompatible

REEF42-SUNB-2023Stainless SteelSunburn Orange22mmCompatible

0350.1.6820.100SteelTurquoise22mmCompatible

REEF42-AST-2024Stainless SteelWhite/Blue Storm22mmCompatible

REEF42-NL-2024Stainless SteelGreen Wave22mmCompatible

0350.1.6820.200SteelIce Blue22mmCompatible

0350.1.6320.200SteelCopper22mmCompatible

0350.1.6720.200SteelPurple22mmCompatible

FX-RE42-GMT-BZ-BL01BronzeBlue22mmCompatible

FX-RE42-GMT-BZ-SD01BronzeSand22mmCompatible

FX-RE42-GMT-GN01Stainless SteelGreen22mmCompatible

FX-RE42-GMT-BZ-GN01BronzeGreen22mmCompatible

FX-RE42-GMT-BZ-RD01BronzeRed22mmCompatible

FX-RE42-GMT-WH01Stainless SteelWhite22mmCompatible

FX-RE42-GMT-BL01Stainless SteelBlack/Blue22mmCompatible

FX-RE42-GMT-RD01Stainless SteelBlack/Red22mmCompatible

RF-42-BL01Stainless SteelBlue22mmCompatible

RF-42-BK01SteelBlack22mmCompatible

RF-42-GN01SteelGreen22mmCompatible

RF-42-GR01SteelGrey22mmCompatible

RF-42-IB01SteelIce Blue22mmCompatible

RF-42-SL01SteelSilver22mmCompatible

RF-42-BG01SteelBurgundy22mmCompatible

RF-42-CB01SteelCobalt22mmCompatible

RF-42-PP01SteelPurple22mmCompatible

RF-42-SD01SteelSand22mmCompatible

REEF-CER-BLK-2023Stainless Steel/CeramicBlack22mmCompatible

REEF-CER-WHT-2024Steel/CeramicWhite22mmCompatible

0350.3.6220.100SteelBlack22mmCompatible

0350.3.6620.100SteelBlue22mmCompatible

0350.3.6420.100SteelGreen22mmCompatible

0350.3.6020.100SteelWhite22mmCompatible

0350.3.6820.100SteelIce Blue22mmCompatible

0350.3.6120.100SteelGrey22mmCompatible

0350.3.6720.100SteelOrange22mmCompatible

0350.3.6920.100SteelTurquoise22mmCompatible

0350.3.4020.100SteelPurple22mmCompatible

0350.3.6620.200Steel/GoldBlue22mmCompatible

REEF-CHR-SNB-2023SteelSand/Black22mmCompatible

REEF42-BLK-2021Stainless SteelBlack22mmCompatible

REEF42-BLU-2021Stainless SteelBlue22mmCompatible

REEF42-GRN-2021Stainless SteelGreen22mmCompatible

REEF42-WHT-2021Stainless SteelWhite22mmCompatible

REEF42-ICEBL-2022Stainless SteelIce Blue22mmCompatible

BREEF42-COP-2022Stainless SteelCopper22mmCompatible

REEF42-CHRONO-2022Stainless SteelBlack/White22mmCompatible

REEF42-CHM-2023Stainless SteelChampagne22mmCompatible

REEF42-SAND-2023Stainless SteelSand22mmCompatible

REEF42-BRG-2023Stainless SteelBurgundy22mmCompatible

REEF-CHR-WB-2023Stainless SteelWhite/Black22mmCompatible

REEF42-ANT-2024Stainless SteelAnthracite22mmCompatible

REEF42-SUN-2024Stainless SteelSunset Orange22mmCompatible

REEF42-GRN2-2024SteelForest Green Ii22mmCompatible

REEF42-ME-SAND-2024SteelDesert Sand22mmCompatible

REEF42-EMR-2024Stainless SteelEmerald Green22mmCompatible

REEF42-BRG2-2025SteelBurgundy Sunburst22mmCompatible

REEF42-JPN-SAK-2025SteelSakura Pink22mmCompatible

REEF42-JPN-IND-2025SteelIndigo Blue22mmCompatible

REEF42-GMT-BRZ-2023BronzeBlack22mmCompatible

REEF42-GMT-BRZ-BLU-2024BronzeBlue Gmt22mmCompatible

REEF42-GMT-BRZ-GRN-2024BronzeGreen Gmt22mmCompatible

REEF42-GMT-BLK-2022Stainless SteelBlack Gmt22mmCompatible

REEF42-GMT-BLU-2022Stainless SteelBlue Gmt22mmCompatible

0350.2.6220.100SteelBlack22mmCompatible

0350.2.6620.100SteelBlue22mmCompatible

0350.2.6420.100SteelGreen22mmCompatible

RF-42-GMT-BK01SteelBlack22mmCompatible

RF-42-GMT-BL01SteelBlue22mmCompatible

REEF42-GMT-BRN-2023Stainless SteelBrown Gmt22mmCompatible

REEF42-GMT-GRN-2023Stainless SteelGreen Gmt22mmCompatible

REEF42-GMT-ORG-2023Stainless SteelOrange Gmt22mmCompatible

REEF42-GMT-WHT-2023Stainless SteelWhite Gmt22mmCompatible

0350.2.6020.100SteelWhite22mmCompatible

RF-42-GMT-GN01SteelGreen22mmCompatible

RF-42-GMT-GR01SteelGrey22mmCompatible

0350.2.6820.100SteelIce Blue22mmCompatible

0350.2.6720.100SteelOrange22mmCompatible

0350.2.6920.100SteelTurquoise22mmCompatible

REEF42-GMT-GLC-2024SteelGlacier White22mmCompatible

REEF42-GMT-PUR-2024SteelPurple Gmt22mmCompatible

REEF42-GMT-SAND-2024SteelSandstorm22mmCompatible

RF-42-GMT-IB01SteelIce Blue22mmCompatible

RF-42-GMT-PP01SteelPurple22mmCompatible

REEF42-GMT-CER-BL-2024Steel/CeramicBlack/Blue22mmCompatible

REEF42-GMT-CER-GRN-2024Steel/CeramicBlack/Green22mmCompatible

REEF42-GMT-WG-2024Steel/GoldWhite22mmCompatible

REEF42-GMT-RED-2024Stainless SteelBlack/Red Gmt22mmCompatible

REEF42-GMT-BLORG-2024Stainless SteelBlue/Orange Gmt22mmCompatible

PRF-42-GMT-01Rose GoldBlue22mmCompatible

0350.2.3020.100SteelCobalt22mmCompatible

0350.2.5020.100SteelNavy22mmCompatible

0350.2.4020.100SteelPurple22mmCompatible

REEF42-GMT-AW2-2025SteelArctic White22mmCompatible

REEF42-GMT-JADE-2025SteelJade Green Gmt22mmCompatible

REEF42-GMT-NSKY-2025SteelNight Sky (Deep Blue)22mmCompatible

RF-42-GMT-CB01SteelCobalt22mmCompatible

RF-42-GMT-CR01SteelCoral22mmCompatible

RF-42-GMT-JD01SteelJade22mmCompatible

FX-RE42-LTD-FB01SteelFrost Blue22mmCompatible

FX-RE42-LTD-DG01SteelDeep Green22mmCompatible

FX-RE42-LTD-MET01SteelMeteorite22mmCompatible

FX-RE42-LTD-JD01SteelJade22mmCompatible

PROTO-FX-ROILSteelBlack Oil22mmCompatible

REEF-RBZ-BLU-2023BronzeBlue22mmCompatible

REEF-RBZ-GRN-2023BronzeGreen22mmCompatible

REEF-STEALTH-GRY-2023SteelGrey Stealth22mmCompatible

REEF-LEO-WHT-2023SteelWhite Leopard22mmCompatible

Space

22mm10 refs+

ReferenceMaterialDialLugSmartlet

SP-42-MB01SteelMeteorite Blue22mmCompatible

SP-42-MG01SteelMeteorite Grey22mmCompatible

SP-42-MK01SteelMeteorite Black22mmCompatible

SP-42-MR01SteelMeteorite Red22mmCompatible

SP-42-MCB01SteelMeteorite Cobalt22mmCompatible

SP-42-MCR01SteelMeteorite Copper22mmCompatible

SP-42-MIB01SteelMeteorite Ice Blue22mmCompatible

SP-42-MJD01SteelJade Meteorite22mmCompatible

SP-42-MG02SteelMeteorite Green22mmCompatible

SP-42-MP01SteelMeteorite Purple22mmCompatible

Swiss

20mm5 refs+

ReferenceMaterialDialLugSmartlet

FMX-SWO-BLU-2023SteelSwiss-Blue20mmCompatible

FMX-SWO-SLV-2023SteelSilver Sunburst20mmCompatible

FMX-HEL-BLUE-2024SteelAlpine Blue20mmCompatible

FMX-HEL-RED-2024SteelRed20mmCompatible

FMX-HEL-WHT-2024SteelWhite20mmCompatible

Vintage

20mm14 refs+

ReferenceMaterialDialLugSmartlet

FX-VT00-CH-BK01SteelBlack20mmCompatible

FX-VT00-CH-BL01SteelBlue20mmCompatible

FX-VT00-CH-GN01SteelGreen20mmCompatible

FX-VT00-CH-GR01SteelGrey20mmCompatible

FX-VT00-CH-BR01SteelBrown20mmCompatible

FX-VT00-CH-IB01SteelIce Blue20mmCompatible

FX-VT00-CH-CB01SteelCobalt20mmCompatible

FX-VT00-CH-PP01SteelPurple20mmCompatible

FX-VT00-CH-RD01SteelRed20mmCompatible

FX-VT00-CH-SD01SteelSand20mmCompatible

VINT-DIV-2004Stainless SteelBlack20mmCompatible

VINT-DIV2-2006Stainless SteelBlack/Red20mmCompatible

VINT-DIV-YL-2006Stainless SteelYellow20mmCompatible

VINT-DIV-BLU-2008Stainless SteelBlue20mmCompatible

Women’s

18mm8 refs+

ReferenceMaterialDialLugSmartlet

LADY-CL-2004SteelMop White18mmCompatible

LADY-CL-DIA-2004SteelWhite/Diamonds18mmCompatible

LADY-BLU-2005SteelBlue18mmCompatible

LADY-ROSE-2006SteelPink18mmCompatible

LADY-ESS-BLU-2024SteelBlue18mmCompatible

LADY-ESS-GRN-2024SteelGreen18mmCompatible

LADY-ESS-PEARL-2024SteelPearl White18mmCompatible

LADY-RACE-PNK-2007SteelPink Racing18mmCompatible

Formex lug widths:

18mm20mm22mm

Frequently paired

Smartwatches worn with Formex

The most common combinations our customers wear. Find your mechanical watch and discover the right Smartlet edition.

Also compatible

Other brands

Smartlet One covers 18mm to 24mm lug widths across the finest watch brands.

Watch brand compatibility guide

Step by step

Replace your strap

Smartlet replaces your mechanical watch strap via the standard spring-bar system. Classic, Shadow, or Titanium. No tools required.

Connect your wearable

Smartlet uses a dedicated adapter or native lug pins depending on your smartwatch. The connector snaps onto the Smartlet module. Zero modification to the mechanical watch.

Wear both simultaneously

Both watches sit on the same wrist. All smartwatch sensors maintain direct skin contact and operate normally.

Questions

Frequently asked questions

Does Smartlet work with Formex watches?

Yes. Formex references from 18mm to 22mm lug width are natively supported by Smartlet One.
Will Smartlet affect the Formex suspended movement system?

No. Smartlet attaches via spring-bar slots at the lug ends. The 4-point suspension system is completely unaffected.
Which Formex models have guides?

The Essence Leggera has a full reference table covering 166 references across 39mm, 41mm, and 43mm case sizes.
¿Smartlet daña o modifica mi reloj mecánico?

No. Smartlet reemplaza tu correa de reloj estándar utilizando el sistema de pasador de resorte existente. No realiza ninguna modificación permanente en la caja, asas o esfera del reloj. El proceso es completamente reversible en segundos. Tu reloj mecánico no se ve afectado y puede usarse de forma independiente en cualquier momento reinstalando su correa original. Smartlet está diseñado con tolerancias de relojero y probado con el mismo cuidado que se dedica a los relojes con los que se empareja.

Únase al movimiento

Wear a smartwatch with your Formex

Wear a smartwatch with your Formex

One mechanism. Three personalities.

Smartlet One, Classic

Smartlet One, Shadow

Smartlet One, Titanium

Formex models supported

Other Formex references

Smartwatches worn with Formex

Other brands

Step by step

Replace your strap

Connect your wearable

Wear both simultaneously

Frequently asked questions