Technical Archive

Hamilton
Khaki Navy H77555135— lug 21mm

Hamilton Khaki Navy H77555135: 21mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Khaki Navy GMT

Artisanal Note

"This model requires a precise 21mm lug width to preserve the original sartorial balance."

Technical Specifications

Hamilton H77555135
Lug Width
21 mm

The essential strap measurement.

Browse 21mm straps →
Reference

H77555135

Movement

ETA caliber 2893-1 Hours, Minutes, Seconds, World Time | Date

The Heritage

The Khaki Navy H77555135 is equipped with the automatic ETA 2893-1 caliber with functions of hours, minutes, seconds, world time, and date. The watch features 21mm lugs and is part of the Hamilton military collection. The movement offers time indication in multiple time zones through the world time function.

FAQ

What is the lug width of the Hamilton Khaki Navy H77555135?

The Khaki Navy H77555135 features a lug width of 21mm, meaning the outer distance between the two attachment pins is precisely 21 millimetres. This specification is critical when purchasing compatible straps: straps sized at 20mm or 22mm will not fit correctly. The 21mm lug width is designated exclusively for this model and a few other Hamilton watches of the same dimensional family.

Which strap do you recommend for the Khaki Navy H77555135?

For the Khaki Navy, we recommend a black or dark grey alligator strap with vegetable tanning, which echoes the severity of the navy dial and maintains aesthetic coherence with the military design. Alternatively, a cognac or tobacco-brown calf leather develops a fascinating patina over time. For marine or sporting use, a Cordura NATO in grey or an FKM rubber strap with single keeper ensures practicality and water resistance. All available in 21mm lug width.

How do I change the strap on my Hamilton Khaki Navy H77555135?

The operation requires a spring bar removal tool. Position the watch on a clean surface, locate the attachment pins on both sides of the case (lugs), and use the tool to gently compress the pin inward whilst extracting it from its socket. The new strap must have a 21mm lug width; insert the pins into the attachment holes and release with gentle pressure until they click into place. Verify that the strap does not contact the case and that the fit is symmetrical.

Can I use an aftermarket strap for this model?

Yes, any strap with a 21mm lug width is compatible, provided tolerances are precise. Artisanal milanostraps.it straps are constructed specifically for this width and undergo rigorous quality control. It is essential to purchase straps from specialised suppliers who respect constructive specifications: budget straps of questionable origin may have loose tolerances and cause damage to the pins or case.

How long does a leather strap last on the Khaki Navy?

A high-quality alligator or calf leather strap, with vegetable tanning, lasts between 5 and 8 years if properly maintained and protected from excessive moisture. Longevity depends on use: daily wear in humid climates accelerates ageing; occasional use in controlled environments prolongs life. The patina that develops is a sign of natural and prized wear. Keepers and stainless steel deployment clasp guarantee longevity superior to the leather itself.