Omega · Seamaster Diver 300M
Strap for Seamaster Diver 300M Automatic 41 Titanium / Electric Blue / 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 2231.80.00 (aka: 22318000)
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 2231.80.00 (aka: 22318000), seen from the bench
Frequently asked questions
What is the lug width of the Omega Seamaster Diver 300M 2231.80.00?
The lug width of the Seamaster Diver 300M 2231.80.00 is exactly 20mm. This dimension is determined by the geometry of the lugs on the 41mm case and is critical for ensuring correct matching with a strap. Always measure the lug width internally, between the two lugs where the strap is inserted, using a digital caliper for maximum accuracy.
Which strap is best suited for the Seamaster Diver 300M in titanium?
For the Seamaster Diver 300M 2231.80.00 in titanium, we recommend alligator with tight grain in cognac brown for elegance or black for minimalism. Vegetable-tanned calf offers superior durability in marine environments. For purely underwater use, technical fabric NATO or FKM rubber ensure complete water resistance. Your choice depends on the balance between aesthetics and function you wish to prioritize.
How do you change the strap on this Omega?
The strap on the 2231.80.00 is changed by removing the spring bars that connect the strap to the case lugs. Use a dedicated tool (spring bar tool) to compress the spring bar and slide it out of the lugs, being careful not to damage the titanium finish. Insert the new 20mm strap by aligning it perfectly in the lugs before securing the spring bars. A titanium deployment clasp facilitates the swap without stressing the keeper loops.
Are aftermarket straps compatible with the Seamaster Diver 300M ref. 2231.80.00?
Yes, any 20mm strap is compatible with the 2231.80.00, provided it is of adequate construction quality. Handcrafted straps in Italian leather, alligator and shell cordovan from Milano Straps are made with millimeter precision to guarantee perfect fit. Always verify that the strap is made for 20mm lug width: a margin of error of 0.5mm creates visible misalignment.
What is the lifespan of a leather strap for the Seamaster Diver 300M?
A structured leather strap (calf, alligator, shell cordovan) on an Omega Seamaster Diver 300M has a lifespan varying from 3 to 5 years if exposed to frequent immersion and salt water. Vegetable tanning offers superior resilience compared to chrome tanning. An FKM rubber strap lasts 5-7 years. To extend its life, avoid prolonged contact with unsrinsed salt water and apply a protective balm seasonally. Milano Straps offers an 18-month warranty on all handcrafted 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

