Strap for Boulton Quartz Small Second Stainless Steel / Silver

The Hamilton Boulton H13421511 features a lug width of exactly 18 mm. This measurement is determined by the geometry of the 27.30 mm diameter case and is critical for strap compatibility. Always verify the measurement using a digital calliper positioned perpendicularly to the lug, measuring the distance between the inner flanges of the collar that houses the strap.

For the Boulton H13421511, straps in first-quality alligator, calf leather with vegetable tanning, or shell cordovan are recommended for a formal aesthetic. For a sportier approach, a NATO strap in heavy cotton or an FKM rubber model are excellent alternatives. Selection depends on intended use and personal colour and patina preferences. All straps must feature an 18 mm lug width.

To change the strap, use a dedicated spring bar removal tool or precision instrument to extract the pins connecting the strap to the case. Position the watch with the case facing downwards, working gently from below to push the pin out of the lug. Once the old strap is removed, align the new strap and reinsert the pin, ensuring it is fully secured. Avoid abrupt movements that could damage the collar.

No. The Boulton H13421511 is specifically engineered for an 18 mm lug width. A 16 mm strap will be too tight in the collar, causing friction and potential wear. A 20 mm or larger strap will create unwanted play, compromising stability and mounting security. It is essential to respect the 18 mm specification to guarantee absolute compatibility and constructive integrity of the watch.

The lifespan of a leather strap depends on material quality and intensity of use. A high-quality alligator or shell cordovan strap with optimal vegetable tanning typically lasts 3–5 years with moderate daily wear. Exposure to sunlight, moisture and frequent water contact accelerate wear and loss of elasticity. Regular maintenance using specialist products and rotation with alternative straps extends overall service life.