Wear a smartwatch with your Doxa

Wear a smartwatch with your Doxa

Smartlet One is compatible with all Doxa SUB 200, SUB 300, and SUB 600T references using 20mm lug width, natively supported with no adapter. Installation uses the standard spring-bar system - no modification to the watch, fully reversible in seconds.
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Doxa compatibility

Wear a smartwatch with your Doxa

In short Smartlet One is compatible with all Doxa SUB 200, SUB 300, and SUB 600T references using 20mm lug width, natively supported with no adapter. Installation uses the standard spring-bar system - no modification to the watch, fully reversible in seconds.

Doxa made the SUB in 1967 and created the professional dive watch colour language. The orange dial was visibility. The graduated unidirectional bezel was survival. Jacques Cousteau wore one. The watch became a cult object not through marketing but through use. Today the SUB 300 carries the same dimensions, the same intent. Smartlet One attaches via the spring-bar system - the same mechanism used for every strap change the SUB has seen in sixty years.

Wear yours How it works
The problem
Choosing between health data and horological heritage every morning.
The solution
Smartlet One replaces your Doxa'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
Doxa
Lug widths
18.0mm / 19.0mm / 20.0mm / 21.0mm / 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 - Shadow - Smartlet

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
Compatibility

Doxa models supported

Doxa SUB 300
20mm

Other Doxa references

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

Atelier
20mm6 refs+
ReferenceMaterialDialLugSmartlet
UNQ-DX-BL-ENWhite GoldBlue Enamel20mmCompatible
UNQ-DX-OCEAN-2024White GoldOcean Engraving20mmCompatible
UNQ-DIVER-ENAM-2024Red GoldEnamel Diver20mmCompatible
SUB-UNQ-ENAM-2024Red GoldBlue Enamel Diver20mmCompatible
UNQ-DX-GFIRE-2024Red GoldRed Fire Enamel20mmCompatible
UNQ-DX-ENGR-2024Red GoldEngraved Diver20mmCompatible
Chronograph
20mm3 refs+
ReferenceMaterialDialLugSmartlet
CHRONO-1976-BRNStainless SteelBrown20mmCompatible
CHRONO-1977-BLUSteelBlue20mmCompatible
CHRONO-1978-SLSteelSilver20mmCompatible
DOXA
20mm / 22mm10 refs+
ReferenceMaterialDialLugSmartlet
ARMY-2022-CERBlack CeramicDesert Camo20mmCompatible
ARMY-1972-OGStainless SteelCamouflage Brown20mmCompatible
ARMY-2022-STStainless SteelCamouflage Beige20mmCompatible
ARMY-II-ST-2023SteelCamo Black20mmCompatible
ARMY-INST2-2023SteelGreen/Black Camo20mmCompatible
DM-1000T-BLK-2018SteelBlack22mmCompatible
DM-1000T-OR-2019SteelOrange22mmCompatible
DM-1000T-YL-2019SteelYellow22mmCompatible
NAV-INST-BLK-2020SteelBlack/Crest20mmCompatible
NAV-INST-BLU-2020SteelBlue/Crest20mmCompatible
Dreadnought
22mm3 refs+
ReferenceMaterialDialLugSmartlet
DREAD-GMT-BK-2013Stainless SteelBlack Gmt22mmCompatible
DREAD-GMT-OR-2014Stainless SteelOrange Gmt22mmCompatible
DRN-PRO-2012Stainless SteelBlack22mmCompatible
Military
20mm3 refs+
ReferenceMaterialDialLugSmartlet
SUB300-MIL-ARC-2023SteelArctic White20mmCompatible
SUB300-MIL-BLKOPS-2023Black DlcBlack Ops20mmCompatible
SUB300-MIL-DSRT-2024SteelSand Tactical20mmCompatible
Prototype
19mm / 20mm / 21mm12 refs+
ReferenceMaterialDialLugSmartlet
PROTO-300-SL-BRZ-2023BronzeSilver Proto20mmCompatible
PROTO-1200T-TI-2024TitaniumGrey Proto20mmCompatible
PROTO-300-CER-2022CeramicBlack Proto20mmCompatible
PROTO-200-DEN-2023SteelGradient Denim19mmCompatible
PROTO-600T-BLU-2023Forged CarbonBlue Proto20mmCompatible
PROTO-300-CARB-RED-2023Forged CarbonRed Proto20mmCompatible
PROTO-300T-SAPPH-2023SapphireClear Proto20mmCompatible
PROTO-600T-SKEL-2023SteelSkeleton Proto20mmCompatible
PROTO-300-CF-SAPPH-2024Forged Carbon/SapphireClear Proto20mmCompatible
PROTO-1500T-CER-2024CeramicBlack Proto21mmCompatible
PROTO-300-UD-2024SteelBlack Proto20mmCompatible
PROTO-DX-SAPSapphireTransparent20mmCompatible
Rare
18mm / 19mm / 20mm7 refs+
ReferenceMaterialDialLugSmartlet
SUB300T-RAR-MBLU-1973SteelMarine Blue20mmCompatible
SUB300-RAR-TOR-1974SteelTropic Orange19mmCompatible
SUB300-RR-1974SteelRuby Red19mmCompatible
SUB300T-BW-1975SteelBlue Wave20mmCompatible
SUB300T-CMD-1976SteelGrey Commando20mmCompatible
SUB200-RAR-SI-1982SteelIce Silver18mmCompatible
SUB200-RC-OR-1983SteelOrange/Black18mmCompatible
SUB
18mm / 19mm / 20mm / 21mm / 22mm194 refs+
ReferenceMaterialDialLugSmartlet
SUB118-1955-PROTStainless SteelBlack18mmCompatible
SUB1200T-OR-2009Stainless SteelOrange20mmCompatible
SUB1200T-YL-2010Stainless SteelYellow20mmCompatible
SUB1200T-SL-2010Stainless SteelSilver20mmCompatible
SUB1200T-BK-2010Stainless SteelBlack20mmCompatible
SUB1200T-BLU-2012Stainless SteelBlue20mmCompatible
SUB1200T-POSE-2016Stainless SteelBlack/Yellow20mmCompatible
SUB1200T-II-OR-2022Stainless SteelOrange20mmCompatible
SUB1200T-II-BK-2022Stainless SteelBlack20mmCompatible
SUB1200T-II-BL-2023Stainless SteelBlue20mmCompatible
SUB1200T-II-SL-2023Stainless SteelSilver20mmCompatible
SUB1500T-SL-2010Stainless SteelSilver21mmCompatible
889.10.201.10SteelBlue21mmCompatible
889.10.361.10SteelYellow21mmCompatible
889.10.351.10SteelOrange21mmCompatible
889.10.021.10SteelSilver21mmCompatible
889.10.101.10SteelBlack21mmCompatible
SUB1500T-OR-2010Stainless SteelOrange21mmCompatible
SUB1500T-BK-2010Stainless SteelBlack21mmCompatible
SUB1500T-YL-2011Stainless SteelYellow21mmCompatible
SUB1500T-POSEIDON-2018Stainless SteelBlack/Yellow21mmCompatible
889.10.021.20SteelWhite21mmCompatible
889.10.101CSteelBlack21mmCompatible
889.10.201CSteelBlue21mmCompatible
889.10.351CSteelOrange21mmCompatible
889.10.361CSteelYellow21mmCompatible
PROTO-DX-TG-CARBCarbonBlack20mmCompatible
PROTO-DX-TG-ARCSteelIce Blue20mmCompatible
SUB200-VQ-1980SteelBlack18mmCompatible
SUB200-QZ-BK-1981Stainless SteelBlack18mmCompatible
SUB200-QZ-BL-1982Stainless SteelBlue18mmCompatible
SUB200-QZ-GLD-1984Gold-PlatedChampagne18mmCompatible
SUB200-QZ-TT-1985Steel/GoldSilver18mmCompatible
SUB200-QZ-CHR-1995SteelBlack20mmCompatible
SUB200-XLS-1997SteelSilver19mmCompatible
SUB200-BLKLAB-1998SteelBlack19mmCompatible
SUB200-PW-1999SteelWhite Pearl19mmCompatible
SUB200-MAR-2000SteelDark Blue19mmCompatible
822.10.351.21SteelOrange20mmCompatible
822.10.021.21SteelSilver20mmCompatible
822.10.361.21SteelYellow20mmCompatible
SUB200-AQ-2019Stainless SteelAquamarine19mmCompatible
SUB200-YL-2019Stainless SteelYellow19mmCompatible
SUB200-OR-2019Stainless SteelOrange19mmCompatible
SUB200-SL-2019Stainless SteelSilver19mmCompatible
SUB200-BK-2019Stainless SteelBlack19mmCompatible
799.10.241.10SteelAquamarine20mmCompatible
799.10.201.10SteelBlue20mmCompatible
799.10.361.10SteelYellow20mmCompatible
799.10.351.10SteelOrange20mmCompatible
799.10.021.10SteelSilver20mmCompatible
799.10.101.10SteelBlack20mmCompatible
799.10.021.20SteelWhite20mmCompatible
200T-GRAPH-OR-2019Stainless SteelOrange20mmCompatible
SUB200-DENIM-2020Stainless SteelBlue Denim19mmCompatible
SUB200-UK-GREY-2020SteelGrey19mmCompatible
200T-GRAPH-SL-2020Stainless SteelSilver20mmCompatible
200T-GRAPH-BK-2020Stainless SteelBlack20mmCompatible
SUB200-CG-BLU-2020Stainless SteelBlue20mmCompatible
SUB200-CG-OR-2020Stainless SteelOrange20mmCompatible
SUB200-CG-SL-2020Stainless SteelSilver20mmCompatible
SUB200-CG-BK-2020Stainless SteelBlack20mmCompatible
798.10.241.10SteelAquamarine20mmCompatible
798.10.201.10SteelBlue20mmCompatible
798.10.361.10SteelYellow20mmCompatible
798.10.351.10SteelOrange20mmCompatible
798.10.021.10SteelSilver20mmCompatible
798.10.101.10SteelBlack20mmCompatible
798.10.021.20SteelWhite20mmCompatible
SUB200-CH-2021SteelMulti-Color19mmCompatible
SUB200-WHP-2021Stainless SteelWhite19mmCompatible
SUB200-US-2021SteelOrange/Blue19mmCompatible
SUB200-CG-YL-2021Stainless SteelYellow20mmCompatible
822.35.351CGoldOrange20mmCompatible
822.10.351CSteelOrange20mmCompatible
SUB200-SAND-2022Stainless SteelSand19mmCompatible
SUB200-CB-LE-2022SteelDeep Blue19mmCompatible
SUB200-ME-2022SteelDesert Bronze19mmCompatible
SUB200-SH-BLKOUT-2022SteelBlackout19mmCompatible
200TG-II-OR-2022SteelOrange20mmCompatible
200CG-II-OR-2022SteelOrange20mmCompatible
200CG-II-SL-2022SteelSilver20mmCompatible
200CG-II-BK-2022SteelBlack20mmCompatible
822.10.361LSteelYellow20mmCompatible
SUB200-CB2-2023SteelBlue19mmCompatible
SUB200-DS2-2023SteelYellow19mmCompatible
SUB200-FR-BLW-2023SteelBlue/White19mmCompatible
SUB200-PR2-2023SteelOrange19mmCompatible
SUB200-SR2-2023SteelSilver19mmCompatible
SUB200-SH2-2023SteelBlack19mmCompatible
SUB200-WP-LE-2023SteelMatte White19mmCompatible
799.10.031.10SteelGrey20mmCompatible
799.10.271.30SteelEmerald Green20mmCompatible
798.10.241.30SteelAquamarine20mmCompatible
798.10.201.30SteelBlue20mmCompatible
798.10.361.30SteelYellow20mmCompatible
798.10.351.30SteelOrange20mmCompatible
798.10.021.30SteelSilver20mmCompatible
798.10.101.30SteelBlack20mmCompatible
798.10.022.30SteelWhite20mmCompatible
200TG-II-BL-2023SteelBlue20mmCompatible
200TG-II-YL-2023SteelYellow20mmCompatible
200TG-II-SL-2023SteelSilver20mmCompatible
200CG-II-DEN-2023SteelBlue Denim20mmCompatible
200CG-II-YL-2023SteelYellow20mmCompatible
CC-200-2024Stainless SteelAntique Black19mmCompatible
799.10.001.10SteelBlack Gradient20mmCompatible
798.10.000.30SteelFull Lume20mmCompatible
798.10.031.30SteelGrey Fade20mmCompatible
798.10.271.30SteelGreen Emerald20mmCompatible
798.10.501.30SteelNavy Blue20mmCompatible
798.10.401.30SteelPurple20mmCompatible
798.10.091.30SteelSand20mmCompatible
822.10.501.21SteelNavy20mmCompatible
822.10.401.21SteelPurple20mmCompatible
SUB200T-OMG-1978SteelOrange Chrono20mmCompatible
PROTO-300T-BLK-1969SteelBlack Proto19mmCompatible
SUB300T-CONQ-1969SteelOrange20mmCompatible
SUB300T-DS-1970SteelBlack/Yellow Dual Signature20mmCompatible
SUB300T-CONQ-SL-1970SteelSilver20mmCompatible
SUB300T-CONQ-BK-1971SteelBlack20mmCompatible
SUB300T-SR-1972SteelSilver20mmCompatible
SUB300T-RACE-1976SteelBlack Racing20mmCompatible
SUB300T-PBBL-1977SteelGrey Pebble20mmCompatible
SUB300T-RACE-OR-1977SteelOrange Racing20mmCompatible
SUB300T-QZ-BK-1993SteelBlack20mmCompatible
SUB300T-QZ-SL-1994SteelSilver20mmCompatible
SUB300T-QZ-BL-1994SteelBlue20mmCompatible
SUB300T-DS-YL-2019Stainless SteelYellow20mmCompatible
SUB300T-PR-OR-2019Stainless SteelOrange20mmCompatible
SUB300T-SR-SL-2019Stainless SteelSilver20mmCompatible
SUB300T-SH-BK-2019Stainless SteelBlack20mmCompatible
840.10.021.31SteelWhite20mmCompatible
840.10.241.60SteelAquamarine20mmCompatible
840.10.201.60SteelBlue20mmCompatible
840.10.361.60SteelYellow20mmCompatible
840.10.351.60SteelOrange20mmCompatible
840.10.021.60SteelSilver20mmCompatible
840.10.101.60SteelBlack20mmCompatible
SUB300T-AQ-2020Stainless SteelAquamarine20mmCompatible
840.10.101CSteelBlack20mmCompatible
840.10.351CSteelOrange20mmCompatible
CC-300T-2023Stainless SteelPatina Brown20mmCompatible
840.10.CUS.10SteelAged Parchment20mmCompatible
SUB4000T-OR-2008Stainless SteelOrange22mmCompatible
SUB4000T-SL-2008Stainless SteelSilver22mmCompatible
SUB4000T-BK-2008Stainless SteelBlack22mmCompatible
SUB4000T-YL-2009Stainless SteelYellow22mmCompatible
SUB4000T-II-BK-2020Stainless SteelBlack22mmCompatible
SUB4000T-II-OR-2020Stainless SteelOrange22mmCompatible
SUB4000T-II-BL-2021Stainless SteelBlue22mmCompatible
SUB4000T-II-YL-2022Stainless SteelYellow22mmCompatible
SUB4000T-II-GRY-2022Stainless SteelGrey22mmCompatible
SUB5000T-OR-2007Stainless SteelOrange22mmCompatible
SUB5000T-SL-2007Stainless SteelSilver22mmCompatible
SUB5000T-BK-2007Stainless SteelBlack22mmCompatible
SUB5000T-II-OR-2021Stainless SteelOrange22mmCompatible
PROTO-600T-CF-2023Forged CarbonGrey Proto20mmCompatible
SUB600T-PAC-2021Stainless SteelPacific Blue20mmCompatible
SUB600T-CB-2021Stainless SteelBlue20mmCompatible
SUB600T-DS-YL-2021Stainless SteelYellow20mmCompatible
SUB600T-SH-2021Stainless SteelBlack20mmCompatible
SUB600T-WP-2021Stainless SteelWhite20mmCompatible
861.10.241.10SteelAquamarine20mmCompatible
861.10.201.10SteelBlue20mmCompatible
861.10.361.10SteelYellow20mmCompatible
861.10.351.10SteelOrange20mmCompatible
861.10.021.10SteelSilver20mmCompatible
861.10.101.10SteelBlack20mmCompatible
861.10.021.20SteelWhite20mmCompatible
861.50.261.32CeramicBlue/Orange20mmCompatible
861.70.201.20CarbonBlue20mmCompatible
861.70.351.20CarbonOrange20mmCompatible
SUB600T-CER-BLKOUT-2023Ceramic BlackBlackout20mmCompatible
SUB600T-CER-MNT-2024Ceramic MintGreen Mint20mmCompatible
SUB600T-CARB-YL-2024Forged CarbonYellow20mmCompatible
SUB600T-CER-RED-2024Red CeramicRed20mmCompatible
SUB600T-TI-BL-2024TitaniumBlue20mmCompatible
SUB800TI-OR-2009TitaniumOrange22mmCompatible
SUB800TI-SL-2010TitaniumSilver22mmCompatible
SUB800TI-BK-2010TitaniumBlack22mmCompatible
785.70.201.11BronzeBlue Camo20mmCompatible
785.70.031.11BronzeBeige Camo20mmCompatible
785.00.031.10SteelBeige Camo20mmCompatible
785.00.031C.10CeramicBlack Camo20mmCompatible
785.00.101.30SteelBlack Camo20mmCompatible
785.00.201.30SteelNavy Camo20mmCompatible
785.00.031.50SteelIce20mmCompatible
785.00.000.30SteelFull Lume Camo20mmCompatible
785.00.271.30SteelGreen Camo20mmCompatible
785.00.031.90SteelBlackout Camo20mmCompatible
SUB-COMP-SL-1961Stainless SteelSilver19mmCompatible
SUB-COMP-1960Stainless SteelBlack19mmCompatible
SUB-PREPRO-1958Stainless SteelBlack Gilt18mmCompatible
Searambler
20mm2 refs+
ReferenceMaterialDialLugSmartlet
SUB300-SR-HER-2022SteelSilver/Black20mmCompatible
SUB300-SR-BLUE-2023SteelBlue20mmCompatible
T.Graph
19mm3 refs+
ReferenceMaterialDialLugSmartlet
TGRAPH-PROT-BK-1970SteelBlack Proto19mmCompatible
PROTO-TGRAPH-1969Stainless SteelOrange Proto19mmCompatible
TGRAPH-1972-ASSYSteelOrange19mmCompatible
Vintage
19mm / 20mm9 refs+
ReferenceMaterialDialLugSmartlet
1967-BL-VTGSteelBlack/Yellow Lung19mmCompatible
1967-CB-VTGSteelBlue19mmCompatible
1967-OR-VTGSteelOrange19mmCompatible
1967-SR-VTGSteelSilver19mmCompatible
1967-SH-VTGSteelBlack19mmCompatible
1968-YL-VTGSteelYellow19mmCompatible
1969-300T-VTGSteelOrange20mmCompatible
1969-300TSHSteelBlack20mmCompatible
1969-300TSRSteelSilver20mmCompatible

Doxa lug widths:

18mm19mm20mm21mm22mm
Frequently paired

Smartwatches worn with Doxa

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

Apple Watch
Series 0 to Ultra 3
Whoop
5.0 / MG
Garmin Forerunner
255 to 965
Samsung Galaxy Watch
Series 4 to 7
Withings ScanWatch
Light / 2 / Nova
View all brands
27 brands covered
Also compatible

Other brands

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

Rolex
Omega
Tag Heuer
Breitling
Tudor
IWC
Longines
Seiko
Hamilton
Grand Seiko
Bell&Ross
Blancpain
Panerai
Cartier
Jaeger Lecoultre
Zenith
Rado
Tissot
Oris
Formex
Timex
Sinn
Porsche Design
Mido
Yema
Christopher Ward
View all
Watch brand compatibility guide

Step by step

Replace your strap
01

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
02

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
03

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 Doxa watches?
    Yes. Doxa references from 18mm to 22mm lug width are natively supported by Smartlet One.
  • Which Doxa models have guides?
    The SUB 300 has a dedicated guide covering all steel and titanium variants.
  • Will Smartlet affect Doxa water resistance?
    No. Smartlet uses the standard spring-bar slots. The 300m water resistance rating is unaffected.
  • Which recent Doxa releases work with Smartlet?
    Doxa expanded its range in 2025 with the SUB 250T, a more compact take on its 1968 case architecture. As always, any reference with standard spring bars between 18mm and 24mm lug width works with Smartlet.
  • Does Smartlet damage or modify my mechanical watch?
    No. Smartlet replaces your standard watch strap using the existing spring-bar system. It makes no permanent modification to the watch case, lugs, or dial. The process is fully reversible in seconds. Your mechanical watch is unaffected and can be worn independently at any time by reinstalling its original strap. Smartlet is engineered to watchmaker tolerances and tested with the same care that goes into the watches it pairs with.