Omega · Seamaster Diver 300M

Strap for Seamaster Diver 300M Automatic 41 Stainless Steel / Black / Bracelet

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

Lug width20 mm
Case diameter41 mm
Reference2254.50.00 (aka: 22545000)
FamilySeamaster Diver 300M
MovementOmega caliber 1120 hours, minutes, seconds | date | chronometer
Year2000
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 2254.50.00 (aka: 22545000)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Seamaster Diver 300M 2254.50.00 (aka: 22545000), seen from the bench

The Omega Seamaster Diver 300M reference 2254.50.00 is a 41mm stainless steel 316L professional dive watch featuring a unidirectional ceramic bezel, sapphire crystal with anti-reflective coating, and 300-meter water resistance. It houses the Omega caliber 1120 automatic movement with COSC chronometer certification and date function. The 20mm lug width accommodates compatible straps while maintaining balanced proportions on the wrist. Launched in the 1990s as an evolution of the legendary Seamaster line, this model represents Swiss diving engineering heritage dating back to 1948.

Frequently asked questions

What is the lug width of the Omega Seamaster Diver 300M 2254.50.00?

The lug width of reference 2254.50.00 is exactly 20 millimetres. This is the critical measurement for purchasing compatible straps. Always verify the distance between the inner shoulders of the lugs before ordering an aftermarket strap.

Which strap pairs best with the Seamaster Diver 300M?

It depends on the dial and intended use. For the blue dial, a slate blue alligator or brown vegetable-tanned calf leather deliver elegance. For pure sportiness, a vulcanized rubber strap with black texture is unbeatable. Cherry shell cordovan creates striking contrast with the stainless steel on both dial versions.

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

Strap replacement is performed by removing the spring bars from the lugs. Use a dedicated two-pronged tool to compress the internal spring of the bar and extract the component from the case. Insert the new strap by aligning the spring bar with the seats on the lugs and allow the spring to close naturally. Verify that the strap has no lateral play.

Is a 20mm aftermarket strap 100% compatible with my 2254.50.00?

Yes, provided the width is actually 20mm (tolerance ±0.5mm maximum). Universal stainless steel 20mm spring bars fit perfectly into the Omega seats. Pay attention to the total strap length: the Seamaster generally requires 12cm for the short end and 10-11cm for the long end, depending on wrist circumference.

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

A quality artisanal leather strap (alligator, calf, shell cordovan) with vegetable tanning lasts 3-5 years with regular use, developing a fascinating patina. Longevity depends on frequency of use, ambient humidity and maintenance. Rubber straps, by contrast, offer superior longevity (8-10 years) thanks to the absence of organic degradation.

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