Strap for Seamaster Diver 300M Master Co-Axial 42 Tokyo 2020 Olympics

The lug width is 20mm, a specific dimension not interchangeable with other Seamaster models. Always verify with a digital caliper the internal space between the case lugs before ordering a strap.

Alligator represents the most noble and durable choice, pairing perfectly with the white ceramic case. For actual underwater use, FKM rubber offers guaranteed water resistance and ease of cleaning. NATO provides mechanical redundancy in case of structural failure.

Use a specialized spring bar tool to remove the lug pins, applying gentle and constant pressure toward the inside of the case. Remove one lug at a time, resting the watch on a soft surface. Install the new strap by pushing the pins until they are fully seated, verifying that the lugs are perfectly aligned.

Yes, any strap with a 20mm lug width is theoretically compatible. However, we recommend manufacturers that respect the tight tolerances required by Omega cases: grade A alligator, leather finishes with calibrated thickness, and solid steel buckles. Milanostraps offers handcrafted straps in these specifications.

A quality alligator strap, with regular maintenance (monthly cleaning, biannual conditioning), lasts eight to twelve years. Vegetable-tanned calf requires more frequent maintenance but can reach ten years. FKM rubber maintains mechanical properties for fifteen to twenty years without visible degradation.