Strap for Seamaster 120M Quartz 36.25 Stainless Steel / Blue / Bracelet

The lug width of the Seamaster 120M 2511.81.00 is 18 millimetres. This measurement refers to the distance between the inner edges of the case lugs and must correspond perfectly to the strap width to ensure correct fitment without lateral play or binding during installation.

Vegetable-tanned alligator and calf leather are the ideal choices for this model. Vegetable-tanned alligator offers a patina that develops naturally over time, while calf leather guarantees softness and elegance. For more sporty contexts, satin rubber and NATO remain authentic and functional options, consistent with the Seamaster's diving heritage.

The strap is replaced by removing the spring bars that connect the strap to the lugs. Using a specific tool called a pry bar or a craftsman's knife, insert the blade between the lug and the spring bar, pressing gently to release the spring bar. Once removed, install the new strap by reversing the procedure. It is recommended to perform this operation with care to avoid damaging the case.

Yes, any universal strap with an 18 millimetre lug width is compatible with the Seamaster 120M 2511.81.00, provided it is manufactured with rigorous tolerances. Our artisanal straps are made specifically for this measurement, guaranteeing perfect fitment without need for adjustments.

The lifespan of a leather strap depends on construction quality and the material chosen. An artisanal vegetable-tanned alligator or calf leather, if maintained with ordinary care, has an estimated useful life of between 3 and 5 years before requiring replacement. Rubber is more resistant and can exceed 5 years. Casati Milano offers an 18-month warranty on all straps produced.