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Hamilton · Boulton

Strap for Boulton Quartz Small Second Medium Stainless Steel / Macaron - Mint

Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

16mm
16 mm strapsAll Hamilton
Lug width16 mm
Case diameter24 mm
ReferenceH13321861
FamilyBoulton
MovementETA caliber 980.163 Hours, Minutes, Small Seconds
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

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Straps for the Boulton H13321861

Selected for the 16 mm lug width

All 16 mm straps →

The Boulton H13321861, seen from the bench

The Hamilton Boulton H13321861 is a contemporary reinterpretation of an icon from the 1940s, featuring a compact rectangular stainless steel case of 23.50mm diameter. The watch is equipped with the ETA caliber 980.163 movement and includes a small seconds indicator. The 16mm lug width is proportioned to balance the case size and ensure comfortable wear without constraint.

Frequently asked questions

What is the exact lug width of the Hamilton Boulton H13321861?

The Hamilton Boulton H13321861 features a <a href="/pages/termine-glossario/misura-ansa">lug width</a> of 16mm. This dimension is model-specific and ensures compatibility only with certified 16mm straps. To verify your measurement, position a digital calliper between the inner shoulders of both lugs: the value must correspond exactly to 16mm.

Which strap type is recommended for the Hamilton Boulton H13321861?

For the Boulton H13321861, we recommend a vegetable-tanned calf leather strap, which emphasises the understated elegance of the rectangular case. Alternatively, an <a href="/pages/termine-glossario/alligatore">alligator</a> strap creates aesthetic synergy with the watch's geometric language, whilst a cotton twill NATO strap offers formal versatility. For sportier use, a fine-grained FKM rubber maintains stylistic integrity.

How do you change the strap on the Hamilton Boulton H13321861?

Position the watch on a soft surface with the dial facing down. Using a spring bar tool, press the small spring located inside the lower lug to release the pin pressure. Once released, the strap will detach easily. Repeat the operation from the other side. To install the new strap, align the pin with the lug hole, press lightly and use the tool to click the opposite side until fully inserted.

Is a 16mm aftermarket strap truly compatible with the H13321861?

Yes, any strap with a 16mm <a href="/pages/termine-glossario/misura-ansa">lug width</a> is compatible with the Hamilton Boulton H13321861, regardless of brand. However, to achieve maximum finish and longevity, we recommend straps produced to artisanal standards: quality materials, precise finishing and meticulous construction ensure a replacement that does not compromise the watch's integrity.

How long does a leather strap last on the Hamilton Boulton H13321861?

The lifespan of a leather strap depends on daily wear, ambient humidity and tanning method. A vegetable-tanned leather strap worn daily lasts approximately 3-5 years before requiring replacement, although patina continues to develop, enriching the aesthetic over time. Regular cleaning and occasional leather balm application extend useful life. Synthetic or FKM rubber straps offer superior durability, up to 7-10 years.

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