Omega
Seamaster Diver 300M 2921.80.91— lug 20mm
Omega Seamaster Diver 300M 2921.80.91: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
Omega 2921.80.91The essential strap measurement.
Browse 20mm straps →2921.80.91
Omega caliber 1538 Hours, Minutes, Seconds | Date | Chronometer
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Seamaster Diver 300M
FAQ
What is the lug width of the Omega Seamaster Diver 300M reference 2921.80.91?
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.
Which strap is most suitable for the Seamaster Diver 300M 2921.80.91?
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.
How do I change the strap on my Omega Seamaster Diver 300M without damaging the case?
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.
Are Milano Straps aftermarket straps compatible with my Seamaster Diver 300M?
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.
How long does a leather strap last on a Seamaster Diver 300M worn daily?
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.
The next step
The right strap isn’t chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →By appointment only · Milan
The atelier's website: casatimilano.com