Strap for Seamaster Diver 300M Automatic 41 Yellow Gold / White / Bracelet

The lug width of the Seamaster Diver 300M 2131.20.00 is 20 millimetres, measured internally between the two attachment pins. This dimension is specific to this model and it is essential to verify it with a calliper before purchasing an aftermarket strap, as even small variations will compromise the fit.

Naturally tanned alligator is the most suitable choice for the 2131.20.00: the regular grain of the leather enhances the lustre of yellow gold and develops patina over time. Shell cordovan is a sophisticated alternative for those who appreciate an almost metallic surface, while high-quality calf leather remains the most versatile and accessible solution.

The strap is replaced by removing the two spring bars (the small pins that hold the strap in the lugs) using a spring bar remover (a tool with a forked end). Insert the tool into the spaces between the strap and case, press downward to make the pin emerge, repeat on the other side. Position the new strap by aligning the holes and reinsert the spring bars until they click into place.

Yes, any strap with a 20mm lug width is compatible with the 2131.20.00. We recommend verifying that the strap is constructed with lugs robust enough to support the weight of yellow gold (approximately 70-80 grams for the case alone). Custom-made artisanal straps ensure optimal comfort and durability.

A high-quality leather strap (naturally tanned alligator or cordovan) lasts on average 3-5 years with regular daily use and proper maintenance (periodic brushing and cleaning with mild detergent). Frequent exposure to salt water or very humid climates reduces the lifespan to 2-3 years. Artisanal straps benefit from robust stitching that can be repaired, extending the useful life of the piece.