Wear a smartwatch with your IWC Portugieser Automatic 40

Wear a smartwatch with your IWC Portugieser Automatic 40

Smartlet is compatible with the IWC Portugieser Automatic 40. Lug width: 18mm / 20mm / 21mm / 22mm - natively supported with no adapter. Installation uses the standard spring-bar system. No modification to the watch required. Fully reversible in seconds.
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IWC Portugieser Automatic 40 compatibility

Wear a smartwatch with your IWC Portugieser Automatic 40

In short Smartlet is compatible with the IWC Portugieser Automatic 40. Lug width: 18mm / 20mm / 21mm / 22mm - natively supported with no adapter. Installation uses the standard spring-bar system. No modification to the watch required. Fully reversible in seconds.

The Portugieser was created in 1939 for Portuguese navigators who needed a pocket-watch movement in a wristwatch case. The 40mm modern interpretation maintains its clean dial hierarchy railway-track minute chapter, applied Arabic numerals, slim profile. Precision, doubled.

Wear yours How it works
The problem
Choosing between health data and horological heritage every morning.
The solution
Smartlet One replaces your IWC Portugieser Automatic 40'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.
Model
IWC Portugieser Automatic 40
Lug width
18mm / 20mm / 21mm / 22mm
References
22covered
Reversible
In seconds

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 (17)

Stealth. Switch in seconds, leave no trace.

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

IWC Portugieser Automatic 40 models supported

Covered references

22 references covered.

ReferenceMaterialDialLugSmartlet
IW371491Stainless Steel 40mmBlue Laureus20mmCompatible
IW371601Stainless Steel 40mmBlue Lacquer20mmCompatible
IW371602Stainless Steel 40mmWhite Lacquer20mmCompatible
325-1954Stainless Steel 37mmSilver18mmCompatible
IW371401Stainless Steel 40mmSilver20mmCompatible
IW371417Stainless Steel 40mmBlue20mmCompatible
IW503501Stainless Steel 42mmSilver22mmCompatible
IW500703Stainless Steel 42mmBlack22mmCompatible
IW500710Stainless Steel 42mmBlue22mmCompatible
IW500705Stainless Steel 42mmSilver22mmCompatible
IW371601Stainless Steel 40mmBlue Lacquer20mmCompatible
IW371602Stainless Steel 40mmWhite Lacquer20mmCompatible
IW371606Stainless Steel 40mmBlue20mmCompatible
IW371605Stainless Steel 40mmWhite20mmCompatible
IW371614Stainless Steel 40mmWhite/Black Panda20mmCompatible
IW544101Stainless Steel 42mmWhite Enamel22mmCompatible
IW50340618K Red Gold 42mmBlue Lacquer22mmCompatible
IW50330218K Red Gold 42mmSilver22mmCompatible
IW50450118K Red Gold 42mmWhite Lacquer22mmCompatible
IW50440118K Red Gold 42mmSilver22mmCompatible
IW390503Stainless Steel 42mmBlue22mmCompatible
PROTO-IW5000-2000Stainless Steel 40mmSilver21mmCompatible

IWC Portugieser Automatic 40 lug widths: 18mm / 20mm / 21mm / 22mm

The Portugieser was created in 1939 for Portuguese navigators who needed a pocket-watch movement in a wristwatch case. The 40mm modern interpretation maintains its clean dial hierarchy railway-track minute chapter, applied Arabic numerals, slim profile. Precision, doubled.
Frequently paired

Smartwatches worn with IWC Portugieser Automatic 40

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

Other iconic models in the Smartlet compatibility library.

Submariner
Daytona
GMT-Master
Datejust
Yacht-Master
Sky-Dweller
Explorer
Seamaster 300m
Speedmaster
Planet Ocean
Constellation
De Ville
Monaco
Carrera
Formula 1
Aquaracer
Navitimer
Superocean
Avenger
Black Bay
Pelagos
Ranger
Luminor
Radiomir
Submersible
SKX
Prospex
Presage
Khaki Field
BR 03-92
Fifty Fathoms
Reverso
SUB 300
Spring Drive
Essence Leggera
Aquis
Divers Sixty-Five
Chronograph 1
Captain Cook
Superman Heritage
El Primero
Monarch
Black Bay 58 GMT
View all models
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 the IWC Portugieser Automatic 40?
    Yes. The IWC Portugieser Automatic 40 uses a 18mm / 20mm / 21mm / 22mm lug width and is fully compatible with Smartlet. Smartlet replaces the standard strap via the spring-bar system. No modification to the watch is required. The setup is fully reversible.
  • Will Smartlet scratch or damage my IWC Portugieser Automatic 40?
    No. Smartlet replaces the strap only and makes no contact with the IWC Portugieser Automatic 40 case or crystal. All contact points are non-abrasive. The system is fully reversible and leaves no trace on the watch.
  • Which smartwatches can I wear with my IWC Portugieser Automatic 40?
    Smartlet is compatible with Apple Watch, Samsung Galaxy Watch, Garmin Forerunner, Garmin Venu, Google Pixel Watch, Polar Vantage, Fitbit Charge, Huawei Watch GT, Withings ScanWatch, Coros, Suunto, and Whoop. The IWC Portugieser Automatic 40 with its 18mm / 20mm / 21mm / 22mm lug width is compatible with the full Smartlet range.
  • Where can I buy Smartlet for the IWC Portugieser Automatic 40?
    Smartlet is available at smartlet.io in Classic, Shadow, and Titanium finishes. Compatible with the IWC Portugieser Automatic 40 and its 18mm / 20mm / 21mm / 22mm lug width. No additional accessory required for standard lug widths between 18mm and 24mm.
  • 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.