Hamilton · Boulton

Strap for Boulton Mechanical Stainless Steel / Blue

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter35 mm
ReferenceH13519641
FamilyBoulton
MovementHamilton caliber H-50 ND 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 Boulton H13519641

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Boulton H13519641, seen from the bench

The Hamilton Boulton H13519641 is a rectangular stainless steel watch from the 1930s, featuring a 34.50 mm case diameter and a 22 mm lug width. It is powered by the Hamilton H-50 ND automatic movement, which displays hours, minutes, and seconds. The watch includes sapphire crystal and water resistance, making it suitable for daily wear while maintaining precision.

Frequently asked questions

What is the lug width of the Hamilton Boulton H13519641?

The lug width of the Hamilton Boulton H13519641 is 22 millimetres. This measurement is essential for selecting compatible straps and bracelets. The measurement is taken perpendicularly between the lugs that secure the strap to the watch case.

What is the best strap for the Hamilton Boulton H13519641?

For the Boulton H13519641, we recommend vegetable-tanned leather or alligator straps for dressy wear, or canvas NATO straps for versatility. The rectangular Art Deco case requires a strap that doesn't compete with the case's geometric lines. Avoid excessively structured straps. On milanostraps.it you'll find selections dedicated to 22mm specifications.

How do I change the strap on my Hamilton Boulton?

The process is straightforward: use a spring bar tool (pin extractor) to gently remove the lug pins. Position the tool perpendicular to the pin, applying gradual pressure until complete removal. Repeat on the opposite side. Insert the new strap in reverse, ensuring the pin clicks into position. Never use hammers or inappropriate tools.

Is an aftermarket strap compatible with the Hamilton Boulton H13519641?

Yes, any 22mm strap is compatible with the Boulton H13519641, provided it meets standard tolerances (3.5-4mm thickness in the pin zone). Artisanal milanostraps.it straps are specifically manufactured to these tolerances. We recommend verifying that the lug curvature suits your wrist shape.

How long does a leather strap last on a Hamilton Boulton?

A quality leather strap, subject to moderate-to-heavy use (3-5 days per week), maintains structural integrity for 3-5 years. Longevity depends on tanning method (vegetable-tanned lasts longer than chrome-tanned), exposure frequency to moisture, and maintenance regime. An alligator strap can exceed 7-8 years with proper care.

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