Wear a smartwatch with your Hamilton Khaki Field

Wear a smartwatch with your Hamilton Khaki Field

Smartlet is compatible with the Hamilton Khaki Field. Lug width: 20mm / 22mm / 24mm - 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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Hamilton Khaki Field compatibility

Wear a smartwatch with your Hamilton Khaki Field

In short Smartlet is compatible with the Hamilton Khaki Field. Lug width: 20mm / 22mm / 24mm - natively supported with no adapter. Installation uses the standard spring-bar system. No modification to the watch required. Fully reversible in seconds.

The Khaki Field descends from watches Hamilton supplied to the US military in the 1940s. Clean legibility, robust construction, and a design that has changed very little since. Smartlet replaces your Khaki Field strap and clips your Apple Watch or Garmin Venu onto the same wrist. Field-tested mechanical precision alongside digital health tracking.

Wear yours How it works
The problem
Choosing between health data and horological heritage every morning.
The solution
Smartlet One replaces your Hamilton Khaki Field'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
Hamilton Khaki Field
Lug width
20mm / 22mm / 24mm
References
15covered
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

Hamilton Khaki Field models supported

Covered references

15 references covered.

ReferenceMaterialDialLugSmartlet
H70215880Titanium 38mmSilver20mmCompatible
H69459530Bronze 38mmBlack20mmCompatible
H70205830Titanium 38mmBlack20mmCompatible
HMT-FC90-1992Stainless Steel 38mmBlack20mmCompatible
H70455533Stainless Steel 38mmBlack20mmCompatible
H70555533Stainless Steel 42mmBlack22mmCompatible
H70535031Stainless Steel 42mmBlack22mmCompatible
H69439131Stainless Steel 38mmWhite20mmCompatible
H69439931Stainless Steel 38mmBlack20mmCompatible
H64455533-NGStainless Steel 38mmBlack Day-Date20mmCompatible
H64465733Stainless Steel 38mmBlue Day-Date20mmCompatible
H70605133Stainless Steel 38mmBlack20mmCompatible
H71626735Stainless Steel 42mmBlack22mmCompatible
H70455533-NGStainless Steel 38mmBlack20mmCompatible
H77706553Stainless Steel 40mmBlack24mmCompatible

Hamilton Khaki Field lug widths: 20mm / 22mm / 24mm

The Khaki Field descends from watches Hamilton supplied to the US military in the 1940s. Clean legibility, robust construction, and a design that has changed very little since. Smartlet replaces your Khaki Field strap and clips your Apple Watch or Garmin Venu onto the same wrist. Field-tested mechanical precision alongside digital health tracking.
Frequently paired

Smartwatches worn with Hamilton Khaki Field

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

Hamilton Khaki Field + Fitbit Charge
Fitbit Charge
→
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
Portugieser
Navitimer
Superocean
Avenger
Black Bay
Pelagos
Ranger
Luminor
Radiomir
Submersible
SKX
Prospex
Presage
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 Hamilton Khaki Field?
    Yes. The Hamilton Khaki Field uses a 20mm / 22mm / 24mm 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 Hamilton Khaki Field?
    No. Smartlet replaces the strap only and makes no contact with the Hamilton Khaki Field 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 Hamilton Khaki Field?
    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 Hamilton Khaki Field with its 20mm / 22mm / 24mm lug width is compatible with the full Smartlet range.
  • Where can I buy Smartlet for the Hamilton Khaki Field?
    Smartlet is available at smartlet.io in Classic, Shadow, and Titanium finishes. Compatible with the Hamilton Khaki Field and its 20mm / 22mm / 24mm 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.