Tissot
PR 100 T150.417.11.091.00 (aka: T1504171109100)— lug 20mm

The lug width is 20mm. This is a non-standard measurement—larger than 18mm but smaller than 22mm—requiring specifically dimensioned straps. You can verify it by measuring the distance between the two lugs (metal pins) that anchor the strap to the case.

The optimal choice depends on intended use: for urban elegance, we recommend vegetable-tanned alligator leather in dark brown tones, which emphasises the case geometry. For everyday versatility, a vintage-aged black calf strap offers both practicality and longevity. For sports contexts, a cotton NATO strap or FKM rubber solution ensures durability with minimal maintenance.

Position the watch on a soft cushion, case-facing upward. Locate the small spring-loaded buttons positioned inside the lugs. By gently pressing each button with a pointed tool (a microscrewdriver or the included strap tool), the lug will disengage. Remove the old strap and insert the new one, ensuring the lug clicks firmly into position.

Yes, quality aftermarket straps are compatible, provided they strictly adhere to the 20mm lug width specification and feature compatible lugs. We recommend artisanal straps from manufacturers who understand the importance of geometric precision. Always verify technical specifications and attachment methods before purchase.

A quality leather strap, when properly maintained, lasts approximately 5–10 years. Lifespan depends on material: vegetable-tanned alligator ages more gracefully than calf. Avoid prolonged moisture exposure and periodically apply neutral leather conditioner. If the buckle slips frequently, arrange a professional adjustment with a specialised craftsperson.