Omega · Seamaster Diver 300M
Strap for Seamaster Diver 300M Automatic 41 Stainless Steel / Blue / Bracelet / James Bond
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 2531.80.00 (aka: 25318000, James Bond, 007)
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 2531.80.00 (aka: 25318000, James Bond, 007), seen from the bench
Frequently asked questions
What is the exact lug width of the Omega Seamaster Diver 300M 2531.80.00?
The lug width of the Omega Seamaster Diver 300M 2531.80.00 is 20 millimetres. This dimension is specific to this model and ensures perfect proportionality between the 41 mm case and the strap. It is essential to measure the space between the lugs with a calliper to avoid incompatible straps.
Which strap do you recommend for the Seamaster Diver 300M 2531.80.00?
Alligator is the aristocratic choice, with fine grain texture that ages magnificently. Cognac or dark brown calf offers versatility between sports and formal contexts. To preserve the diving vocation, satinised rubber or neoprene straps resist chlorine and salt water. Shell cordovan develops a honey-amber patina after months of wear.
How do I change the strap on my Omega Seamaster Diver 300M?
The Seamaster uses standard 20 mm lugs. Position the watch with the case facing upwards, use a spring bar tool to gently press the internal spring of one of the lugs, extract the old strap. Insert the new lug into the spring bar, verify that the spring clicks into position, repeat on the other side. Check alignment before wearing.
Can I use a compatible aftermarket strap on this 2531.80.00?
Yes, provided the lug width is exactly 20 mm. Aftermarket straps in leather, rubber or fabric are compatible if they respect this dimension. Caution: universal straps or other sizes create unacceptable gaps and friction. Specialist suppliers like milanostraps.it guarantee certified compatibility.
How long does a leather strap last on the Seamaster Diver 300M?
A premium leather strap (alligator, calf, shell cordovan) lasts an average of 3-5 years with moderate daily use, considering humidity, sun and friction. Vegetable tanning ages more rapidly but develops a fascinating patina. Rubber or neoprene straps have greater durability (5-7 years) if not exposed to prolonged concentrated chlorine. Casati Milano offers an 18-month warranty on all made-to-measure straps.
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

