Omega · Seamaster Diver 300M

Strap for Seamaster Diver 300M Quartz 36.25 Stainless Steel / Black / Rubber

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter36 mm
Reference2962.50.91
FamilySeamaster Diver 300M
MovementOmega caliber 1538 hours, minutes, seconds | date | chronometer
CaseStainless Steel

Recommended spring bar

Spring bars Omega 20mm — 1.8mm diameter

Technical match for lug width and diameter · lug 20 mm · Ø 1.8 mm

All Omega spring barsOpen →

Straps for the Seamaster Diver 300M 2962.50.91

Selected for the 20 mm lug width · workshop selection

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The Seamaster Diver 300M 2962.50.91, seen from the bench

The Omega Seamaster Diver 300M reference 2962.50.91 is a professional diving watch introduced in 1993. It features a 36.25mm stainless steel 316L case with a 20mm lug width, rated for 300 metres depth. The watch is powered by the Omega 1538 quartz movement with chronograph function, date indicator, and hour-minute-second subdials. The sapphire crystal with anti-reflective coating, screw-down caseback, and detachable crown provide water resistance for demanding marine environments.

Frequently asked questions

What lug width does the Omega Seamaster Diver 300M 2962.50.91 have?

The Omega Seamaster Diver 300M ref. 2962.50.91 features a lug width of 20mm. This measurement is specific to this model and determines which aftermarket strap or bracelet you can pair with it. To verify compatibility, always ensure that the strap explicitly states 20mm width at both ends.

Which strap should I choose for the Seamaster Diver 300M 2962.50.91?

For the Seamaster 300M we recommend three categories: (1) <a href="/pages/termine-glossario/alligatore">alligator</a> or calf leather in blue-black tones to enhance the blue dial; (2) FKM rubber or silicone because it replicates the original underwater environment and guarantees exceptional grip; (3) <a href="/pages/termine-glossario/shell-cordovan">shell cordovan</a> in cognac color for those who want to transition from diver to elegant evening watch. The choice depends on usage: frequent diving requires rubber, mixed use favors leather.

How do I change the strap on the Seamaster Diver 300M?

The Seamaster Diver 300M 2962.50.91 is equipped with straight lugs (not curved). To remove the original strap: (1) obtain a strap removal tool or specific instrument; (2) locate the spring bars (small metal springs) that connect the strap to the case; (3) gently push the spring bar inward with the tool to create space; (4) extract the strap. For the new strap, insert the spring bars into the appropriate slots and let the springs return to position. If you prefer to avoid the risk, the Casati Milano atelier performs the change with warranty on the work.

Is an aftermarket strap compatible with the Seamaster Diver 300M 2962.50.91?

Yes, provided it is specified for 20mm lug width. On MilanoStraps you will find a selection of <a href="https://milanostraps.it/collections/cinturini-orologi-per-misura-ansa-20mm">compatible 20mm straps</a> ready for shipping. Always verify: (1) 20mm lug width confirmed by the seller; (2) compatibility with 36-37mm case diameter (not mandatory but recommended for correct proportions); (3) type of clasp required (standard or <a href="/pages/termine-glossario/deployante">deployante</a>). Custom straps from Casati Milano offer 18-month warranty and complete customization on sizes and colors.

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

A quality leather strap undergoes natural aging. On a regularly used Seamaster Diver 300M (not in frequent diving), the leather lasts 3-5 years before showing signs of fatigue: fiber thinning, yellowing, loss of elasticity at the folds. Exposure to chlorine and salt water accelerates wear; direct sun exposure causes discoloration. To extend its life: avoid diving with leather, apply conditioning balm every 2-3 months, dry immediately after accidental water contact. A rubber strap or improved <a href="/pages/termine-glossario/concia-vegetale">vegetable tanned</a> leather can reach 7-8 years.

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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Casati Milano · Via XX Settembre 15, Milan · by appointment only