Strap for Seamaster Diver 300M Quartz 41 Stainless Steel / Blue / SwissTiming

The Omega Seamaster Diver 300M 2921.80.91 has a lug width of 20mm. This measurement is standard for all steel versions of this model and is compatible with the entire range of artisanal straps certified by Milano Straps for this specific lug width.

The choice depends on usage: for classic professional style we recommend black alligator with steel deployant; for everyday versatility, vegetable-tanned calf develops a fascinating patina with age; for aquatic environments, FKM rubber or NATO nylon ensure maximum moisture resistance.

Identify the lug pins (located at the ends of the case): use a specialized tool to push the pin from the inside outward, working from one end at a time. Always support the case with one hand to prevent drops. If you lack experience, contact an authorized center, or rely on the professional replacement service from Casati Milano.

Yes, fully compatible. Milano Straps produces straps with a 20mm lug width identical to Omega specifications for the 2921.80.91. All models in the 20mm collection are tested on the Seamaster case. Compatibility is guaranteed both in lug measurement and structural robustness to support the case weight.

A quality alligator or calf strap, with proper maintenance (avoid prolonged moisture, apply natural conditioner every 6 months), lasts 4-7 years of daily wear. Shell cordovan resists longer thanks to leather density, while nylon NATO exceeds 10 years. Milano Straps offers 18-month warranty and reconditioning services.