Technical Archive

Omega
Seamaster Diver 300M 2952.50.91— lug 20mm

Omega Seamaster Diver 300M 2952.50.91: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Seamaster Diver 300M Automatic 36.25 Stainless Steel / Black / Rubber

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Omega 2952.50.91
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

2952.50.91

Movement

Omega caliber 1120 Hours, Minutes, Seconds | Date | Chronometer

The Heritage

The Omega Seamaster Diver 300M model 2952.50.91 is a mid-size professional diving watch with a 36.25mm stainless steel case and unidirectional bezel featuring 60 clicks. It houses the automatic Omega caliber 1120 movement with date indicator and 28,800 vibrations per hour, certified COSC chronometer-grade. The 20mm lug width accommodates aftermarket straps while maintaining optimal proportions with the case and sapphire crystal. Water-resistant to 300 meters, this timepiece combines underwater capability with everyday wearability.

FAQ

What is the lug width of the Omega Seamaster Diver 300M reference 2952.50.91?

The lug width is exactly 20mm. This specification is essential for selecting a compatible strap. Measure perpendicular to the two suspension pins, excluding the case lugs, to confirm the width before ordering.

What is the best strap for the Omega Seamaster Diver 300M 2952.50.91?

It depends on usage. For elegance: brown or black alligator with contrasting stitching. For sports versatility: regenerated calf with vegetable tanning in cognac or sand tones. For water performance: dark grey or blue FKM rubber. All compatible with the 20mm lug width.

How do you change the strap on this Seamaster model?

The caseback of the 2952.50.91 is screw-down, but strap replacement occurs at the lugs. Using a springbar tool or small flat-head screwdriver, gently release the suspension pin, remove the worn strap, and insert the new one (20mm). The procedure takes 5 minutes and requires no technical skills.

Can I use a 19mm or 21mm strap instead of the original 20mm?

No. A smaller lug width will not insert into the pins, while a larger one creates dangerous play between strap and case, compromising aesthetics and security. Strictly respect the 20mm specification for correct compatibility and proportions.

How long does a leather strap last on the Omega Seamaster Diver 300M?

An alligator or vegetable-tanned calf strap lasts 24-36 months of daily wear, provided it is not exposed to constant moisture. FKM rubber is indefinitely durable but degrades over time with UV rays. Natural patina on leather is part of the charm: minor cracking does not indicate failure, but acquired character.

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.

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By appointment only · Milan

The atelier's website: casatimilano.com