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 width
Straps for the Seamaster Diver 300M 2254.50.00 (aka: 22545000)
Selected for the 20 mm lug width · workshop selection
Black Alligator Strap with Light Blue Edges€149
Red Alligator Strap Water Resistant€195
Green Rubberized Alligator Strap with Ecru Tribal Stitching€149
Military Alligator Green Strap€138
Hammered Calfskin Strap Light Blue€98
The Seamaster Diver 300M 2254.50.00 (aka: 22545000), seen from the bench
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.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only

