Omega · Seamaster Diver 300M
Strap for Seamaster Diver 300M Automatic 36.25 White Gold / Black / Rubber
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 2652.50.91
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 2652.50.91, seen from the bench
Frequently asked questions
What lug width does the Omega Seamaster Diver 300M 2652.50.91 have?
The Omega Seamaster Diver 300M 2652.50.91 has a lug width of 20mm. This measurement is taken from the inner distance between the case lugs and remains constant across all examples of this reference. The measurement does not correspond to the case diameter (36.25mm), but is determined by the specific width of the original lugs.
What is the best strap for the Omega Seamaster Diver 300M in white gold?
For the 2652.50.91 in white gold, dark brown or black alligator represents the most elegant choice, creating a sophisticated contrast with the precious metal. Alternatively, vegetable-tanned calf leather offers a natural aging patina and contemporary appeal. For sporty and daily wear, a black rubber strap or NATO strap provide functionality and versatility without aesthetic compromise.
How do you change the strap on an Omega Seamaster Diver 300M?
Changing the strap on a Seamaster Diver 300M requires the use of a spring bar tool, a specialized instrument that allows you to disengage the retaining springs from the lugs. Gently press one end of the spring to disengage it from the lug, then remove the old strap. Insert the new strap by snapping the spring into the corresponding holes on the lugs. It is preferable to perform this operation on a soft surface to avoid scratching the case.
Which aftermarket straps are compatible with the 2652.50.91?
Any strap with a lug width of 20mm is compatible with the 2652.50.91. Milano Straps offers a complete collection of customizable 20mm straps in alligator leather, shell cordovan, calf leather and technical materials, all ready to ship and crafted according to artisanal quality standards. The Casati Milano atelier also creates custom straps with personal leather selection.
How long does a leather strap last on an Omega Seamaster?
The lifespan of a leather strap depends on the material and use. Alligator and shell cordovan, if properly cared for, last 3 to 5 years in daily wear. Vegetable-tanned calf leather has a similar lifespan, but its natural patina makes it visibly aged before structural failure. All artisanal Milano Straps straps benefit from an 18-month warranty when purchased at the Casati Milano atelier.
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

