Strap for Seamaster Diver 300M Automatic 41 GMT Yellow Gold / Blue / Leather

The lug width of the Seamaster Diver 300M 2634.80.93 is 20mm. This width is standard for this model in both the yellow gold version and other material variants. Before purchasing an aftermarket strap, always verify the measurement with a digital caliper to ensure perfect compatibility with the case lugs.

Cognac brown alligator or vegetable-tanned calf leather represent the most elegant choices for a yellow gold Seamaster, as they create natural chromatic harmony. For sporty contexts, black FKM rubber or a navy blue NATO strap offer practicality without sacrificing sobriety. The choice depends on your primary use: formal versus sporty-versatile.

Use a spring bar tool to gently disengage the elastic pins from the lugs. Rest the watch on a soft surface and position the tool under the pin spring, avoiding direct pressure on the case or crystal. Insert the new strap by aligning the holes and press the pin until it clicks. If unsure, consult a watchmaker: Casati Milano offers this service by appointment.

Yes, aftermarket straps with a 20mm lug width are completely compatible with the Seamaster Diver 300M 2634.80.93, provided they are made to the appropriate quality and thickness standards. Always verify that the seller explicitly specifies compatibility with this reference. Milano Straps offers a collection dedicated to 20mm straps, with detailed compatibility descriptions.

A quality leather strap (alligator, calf, shell cordovan with vegetable tanning) lasts an average of 3-5 years with regular daily use, while developing a patina that increases its appeal. Durability depends on frequency of use, exposure to moisture, and maintenance. The 18-month warranty offered by Casati Milano covers manufacturing defects, not natural wear. To extend the life, alternate the strap with other models if you own multiple watches.