Strap for Boulton Quartz Small Second Stainless Steel / Silver

The lug width of the Hamilton Boulton H13421611 measures exactly 18.00 mm. This dimension is standard for compact models with a 27.30 mm case diameter. The measurement is taken internally between the horizontal pins of the case lugs. The accepted tolerance is ±0.5 mm to ensure precise fitting.

We recommend alligator or vegetable-tanned calf leather straps for the Boulton, which emphasise the purity of the model's proportions. Dark brown alligator offers formality; cognac or walnut calf ensures versatility and develops natural patina over time. NATO fabric straps are ideal for daily use. The choice depends on usage context and desired colour palette.

To change the strap, you will need a spring bar removal tool. Locate the horizontal pins securing the 18 mm strap to the case lugs. Insert the tool gently from below the pin, lift the internal metal eye, and slide the strap outward. The procedure takes approximately 5 minutes per side. Alternatively, NATO straps with integrated passant swap without tools.

Yes, any strap with an 18 mm lug width is compatible with the Boulton. The lug width specification (18 mm) makes the strap universal. We recommend verifying that the strap is of appropriate construction quality and that the pins are properly dimensioned to avoid loosening. Artisanal vegetable-tanned straps offer superior longevity compared to industrial products.

A quality leather strap, such as vegetable-tanned leather, typically lasts 3–5 years with daily use. Durability depends on frequency of use, environmental humidity, and care. Vegetable-tanned leather ages gracefully, developing patina and character over time. Alligator straps offer greater resistance to wear. Regular maintenance with specialist creams and rotation between straps significantly extends service life.