Wear a smartwatch with your Omega Seamaster 300M

Wear a smartwatch with your Omega Seamaster 300M

Smartlet is compatible with the Omega Seamaster 300M. Lug width: 19mm / 20mm / 21mm - 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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Omega Seamaster 300M compatibility

Wear a smartwatch with your Omega Seamaster 300M

In short Smartlet is compatible with the Omega Seamaster 300M. Lug width: 19mm / 20mm / 21mm - natively supported with no adapter. Installation uses the standard spring-bar system. No modification to the watch required. Fully reversible in seconds.

James Bond has worn the Seamaster 300M since 1995. The wave-pattern dial, the helium escape valve, the Master Chronometer certification this is a working diver's watch that also happens to be beautiful. Smartlet clips your Apple Watch, Garmin, Both instruments are active. Both are precise.

Wear yours How it works
The problem
Choosing between health data and horological heritage every morning.
The solution
Smartlet One replaces your Omega Seamaster 300M'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
Omega Seamaster 300M
Lug width
19mm / 20mm / 21mm
References
21covered
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

Omega Seamaster 300M models supported

Covered references

21 references covered.

ReferenceMaterialDialLugSmartlet
233.32.41.21.01.001Stainless Steel 41mmBlack20mmCompatible
CK2913-1Stainless Steel 41mmBlack19mmCompatible
CK2913-3Stainless Steel 41mmBlack19mmCompatible
CK14755Stainless Steel 41mmBlack19mmCompatible
CK165.024Stainless Steel 41mmBlack20mmCompatible
165.024 MoDStainless Steel 41mmBlack “T Circle”20mmCompatible
166.024 MoDStainless Steel 41mmBlack “T Circle”20mmCompatible
166.024Stainless Steel 41mmBlack20mmCompatible
233.30.41.21.01.001Stainless Steel 42mmBlack21mmCompatible
233.30.41.21.03.001Stainless Steel 42mmBlue21mmCompatible
234.10.39.20.01.001Stainless Steel 41mmBlack19mmCompatible
234.10.39.20.01.001Stainless Steel 41mmBlack19mmCompatible
234.92.41.21.10.001Bronze Gold 42mmBrown21mmCompatible
234.30.41.21.01.001Stainless Steel 42mmBlack21mmCompatible
234.30.41.21.03.001Stainless Steel 42mmBlue21mmCompatible
234.30.41.21.01.001Stainless Steel 42mmBlack21mmCompatible
234.30.41.21.01.001Stainless Steel 42mmBlack21mmCompatible
234.30.41.21.03.001Stainless Steel 42mmBlue21mmCompatible
522.30.41.20.01.002Stainless Steel 41mmBlack London Crest20mmCompatible
522.30.41.20.01.001Stainless Steel 41mmBlack Rio Dial20mmCompatible
522.30.41.20.03.001Stainless Steel 41mmBlue/Beijing20mmCompatible

Omega Seamaster 300M lug widths: 19mm / 20mm / 21mm

James Bond has worn the Seamaster 300M since 1995. The wave-pattern dial, the helium escape valve, the Master Chronometer certification this is a working diver's watch that also happens to be beautiful. Smartlet clips your Apple Watch, Garmin, Both instruments are active. Both are precise. The 2025 Seamaster Diver 300M Bronze Gold brought Omega's exclusive alloy to the collection, echoing the 007 Edition.
Frequently paired

Smartwatches worn with Omega Seamaster 300M

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
Combination guides

Wear it both ways

Omega Seamaster 300M + Apple Watch
Apple Watch
→
Omega Seamaster 300M + Whoop
Whoop
→
Also compatible

Other brands

Other iconic models in the Smartlet compatibility library.

Submariner
Daytona
GMT-Master
Datejust
Yacht-Master
Sky-Dweller
Explorer
Speedmaster
Planet Ocean
Constellation
De Ville
Monaco
Carrera
Formula 1
Aquaracer
Portugieser
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 Omega Seamaster 300M?
    Yes. The Omega Seamaster 300M uses a 19mm / 20mm / 21mm 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 Omega Seamaster 300M?
    No. Smartlet replaces the strap only and makes no contact with the Omega Seamaster 300M 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 Omega Seamaster 300M?
    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 Omega Seamaster 300M with its 19mm / 20mm / 21mm lug width is compatible with the full Smartlet range.
  • Where can I buy Smartlet for the Omega Seamaster 300M?
    Smartlet is available at smartlet.io in Classic, Shadow, and Titanium finishes. Compatible with the Omega Seamaster 300M and its 19mm / 20mm / 21mm 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.