Hamilton · Khaki Field

Strap for Khaki Field Quartz 38 Stainless Steel / Blue

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter38 mm
ReferenceH69401940
FamilyKhaki Field
MovementETA caliber F06.105 Hours, Minutes, Seconds
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Khaki Field H69401940

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Khaki Field H69401940, seen from the bench

The Hamilton Khaki Field H69401940 is a 38 mm stainless steel field watch representing American watchmaking tradition. It features an ETA caliber F06.105 automatic movement with 64-hour power reserve, sapphire crystal, and water resistance to 100 metres. The 20 mm lug width accommodates a wide range of straps and maintains classic proportions suitable for various wrist sizes.

Frequently asked questions

What is the lug width of the Hamilton Khaki Field H69401940?

The Hamilton Khaki Field H69401940 features a lug width of exactly 20 millimetres. This lug width is standard across the mid-size models in the Khaki Field collection and compatible with a wide range of handcrafted straps. To verify compatibility, measure the distance between the lugs using a digital calliper.

What is the best strap for the Hamilton Khaki Field H69401940?

The choice depends on your intended use. For elegance, we recommend an alligator or shell cordovan strap in cognac. For everyday practicality, a vegetable-tanned calf leather strap with natural patina development. For sports and aquatic environments, a vulcanised rubber strap with fine grain texture. All available in 20mm size at milanostraps.it.

How do I change the strap on the Hamilton Khaki Field H69401940?

Strap replacement requires two tools: a spring bar tool or a small screwdriver. Position the watch face-down, locate the small springs that secure the lugs, gently push them inward towards the case centre to release them, and replace the strap. The operation takes 2-3 minutes. Atelier Casati Milano offers personalised guidance by appointment.

Can I use an aftermarket strap with my Hamilton H69401940?

Yes, absolutely. The H69401940 is compatible with any strap measuring 20mm, including handcrafted aftermarket options. The straps offered by milanostraps.it are specifically selected for cases of this size and maintain precise manufacturing tolerances to avoid lateral play and ensure optimal fit.

How long does a leather strap last on the Hamilton Khaki Field H69401940?

Durability depends on material and usage. A high-quality vegetable-tanned calf leather strap typically lasts 3-5 years with daily wear, whilst developing a natural patina that increases its character. Alligator and shell cordovan, being more durable, can last 5-10 years. Regular maintenance (cleaning and occasional conditioning) and rotation with other straps significantly extend lifespan.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only