Hamilton · American Classic

Strap for Thin-O-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 diameter38 mm
ReferenceH38415131
FamilyAmerican Classic
MovementETA caliber 2824-2 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 American Classic H38415131

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The American Classic H38415131, seen from the bench

The Hamilton American Classic H38415131 is a 38mm stainless steel watch from the American Classic collection, powered by the ETA 2824-2 automatic movement. It features hours, minutes, seconds hands and a date window, reflecting mid-20th century American watchmaking with its minimalist design and practical functionality. The 20mm lug width accommodates standard straps.

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