Strap for Boulton Mechanical Stainless Steel / White

The lug width of the Hamilton Boulton H13519711 is 22 millimetres. This unconventional measurement, compared to standard 20mm or 24mm dimensions, requires careful strap selection. Measuring is straightforward: use a digital calliper or ruler to measure the distance between the internal spring bar holes from one lug to the other.

The optimal strap depends on intended usage. For formal elegance, we recommend alligator in cognac or vegetable-tanned calf in black. For versatility, a ballistic cotton NATO offers practical aesthetics. Your ideal choice reflects context: alligator ennobles, calf ages naturally, NATO democratises the timepiece.

To change the strap, remove the spring bars securing the strap to the lugs. Use a dedicated tool (pry tool or strap changer) to depress the bar downward, releasing one end of the old strap. Repeat from the opposite side. Insert the bars into the new strap, ensuring they are firmly secured on both sides of the case.

No, a 22mm strap is specific to watches with lugs precisely 22 millimetres apart. It is not compatible with watches of different measurements (20mm, 24mm, etc.). When purchasing a strap, verify that the lug width matches your watch exactly to avoid attachment issues.

Strap longevity depends on material and usage patterns. Vegetable-tanned calf typically lasts 5–8 years with moderate daily wear, whilst alligator (a more robust hide) can endure 8–12 years. The natural patina developing over time is regarded as a desirable characteristic. Periodic maintenance—gentle cleaning and occasional conditioning—extends strap lifespan.