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Wear a smartwatch with your Hamilton Khaki Field | Smartlet

Hamilton compatibility guide

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.

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.
ModelHamilton Khaki Field
Lug width20mm / 22mm / 24mm
Case size38mm - 42mm
MovementCal. H-50 / H-10
Water resistance100m
Introduced1940s
Smartlet compatibleYes
References

Covered references

Reference Smartlet Lug width Case Case material Dial
H70215880 Compatible 20mm 38mm Titanium Silver
H69459530 Compatible 20mm 38mm Bronze Black
H70205830 Compatible 20mm 38mm Titanium Black
HMT-FC90-1992 Compatible 20mm 38mm Stainless Steel Black
H70455533 Compatible 20mm 38mm Stainless Steel Black
H70555533 Compatible 22mm 42mm Stainless Steel Black
H70535031 Compatible 22mm 42mm Stainless Steel Black
H69439131 Compatible 20mm 38mm Stainless Steel White
H69439931 Compatible 20mm 38mm Stainless Steel Black
H64455533-NG Compatible 20mm 38mm Stainless Steel Black Day-Date
H64465733 Compatible 20mm 38mm Stainless Steel Blue Day-Date
H70605133 Compatible 20mm 38mm Stainless Steel Black
H71626735 Compatible 22mm 42mm Stainless Steel Black
H70455533-NG Compatible 20mm 38mm Stainless Steel Black
H77706553 Compatible 24mm 40mm Stainless Steel Black
Smartlet compatibility

The Hamilton Khaki Field uses 20mm to 24mm lug widths depending on reference. Smartlet attaches via the standard spring-bar system. Zero contact with the watch case, lugs, or crystal. Fully reversible in seconds.

Compatible smartwatches

Smartwatches to pair with your Hamilton Khaki Field

All smartwatches below can be worn simultaneously with your Hamilton Khaki Field via Smartlet.

View all compatible smartwatches →
Questions

Frequently asked

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 and positions your smartwatch on the same wrist. The Hamilton Khaki Field requires no modification, no drilling, and no adhesive. The setup is fully reversible in seconds and your Hamilton can be worn independently at any time by reinstalling its original strap.

Will Smartlet scratch or damage my Hamilton Khaki Field?+

No. Smartlet makes no contact with the Hamilton Khaki Field case, bezel, or crystal. It replaces the strap only, using the existing spring-bar slots. The module is manufactured in 316L stainless steel or titanium with polished and brushed finishing, and all contact points are non-abrasive. Your Hamilton Khaki Field is protected throughout. The system is fully reversible and leaves no trace.

Which smartwatches can I wear with my Hamilton Khaki Field?+

Smartlet is compatible with Apple Watch (all series), Samsung Galaxy Watch (4, 5, 6, 7), Garmin Fenix (6, 7, 8), 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. All smartwatch sensors remain operational when worn via Smartlet.

Where can I buy Smartlet for the Hamilton Khaki Field?+

Smartlet is available directly at smartlet.io in three finishes: Classic (316L stainless steel), Shadow (PVD black-coated 316L), and Titanium. All three finishes are compatible with the Hamilton Khaki Field and work with its 20mm / 22mm / 24mm lug width. Orders ship internationally from Europe. No additional accessory is required for standard lug widths between 18mm and 24mm.