Hamilton · Chrono-Matic
Strap for Chrono-Matic 50 Auto Chrono Limited Edition Blue
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
20mm
Lug width20 mm
Case diameter49 mm
ReferenceH51606640
FamilyChrono-Matic
MovementHamilton caliber H-31 hours, minutes, small seconds | date | Chronograph
Year2025
CaseStainless Steel
Straps for the Chrono-Matic H51606640
Selected for the 20 mm lug width · workshop selection
Hammered calfskin strap in cuoio€98
Grey Hammered Leather Strap with Ecru Stitching€98
Brown Saffiano Leather Strap€90
Black Saffiano Rubber Strap€105
Dark Brown Calfskin Military Strap€80
The Chrono-Matic H51606640, seen from the bench
The Hamilton Chrono-Matic H51606640 is an automatic chronograph introduced in 1969, featuring the Hamilton Caliber H-31 movement. The cushion case measures 48.50mm in stainless steel with an integrated lug design. The lug width is 20mm, accommodating a proportionate strap that complements the case size and maintains visual harmony with the chronograph dial layout.
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