Hamilton · Intra-Matic

Strap for Intra-Matic

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

Lug width20 mm
Case diameter42 mm
ReferenceH38455151
FamilyIntra-Matic
MovementETA caliber 2892-A2 Hours, Minutes, Seconds | Date
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 Intra-Matic H38455151

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Intra-Matic H38455151, seen from the bench

The Hamilton Intra-Matic H38455151 revives 1960s American sports watchmaking heritage. It features a 42mm stainless steel 316L case with a 20mm lug width and unidirectional rotating bezel with applied indices. The watch is powered by an ETA 2892-A2 Swiss automatic movement beating at 28,800 vibrations per minute, offering precision within ±10 seconds per day. The dial displays hours, minutes, seconds, and date. The integrated 20mm lugs are a structural feature of the case design, ensuring solid geometry for aftermarket strap compatibility.

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.

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