Omega · Seamaster 300
Strap for Omega Seamaster 300 233.92.41.21.03.001
The Seamaster 300 Master Co-Axial Titanium / Blue / Strap takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Recommended spring bar
Straps for the Seamaster 300 233.92.41.21.03.001
Selected for the 21 mm lug width · workshop selection
Matte Black Alligator Strap★ 5 · 1€195
Matte Dark Gray Alligator Strap€195
Millennium Green Alligator Strap★ 5 · 1€195
Grey Hammered Leather Strap with Ecru Stitching€98
Hammered Calfskin Strap Light Blue€98
What I'm asked about the Omega Seamaster 300 233.92.41.21.03.001
What strap size does the Omega Seamaster 300 233.92.41.21.03.001 take?
The Omega Seamaster 300 233.92.41.21.03.001 needs 21 mm between the lugs, usually 18 mm at the buckle. It's the size I've been fitting on it for years.
Can the strap on the Omega Seamaster 300 233.92.41.21.03.001 be changed?
Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.
Can I put a leather strap on the Omega Seamaster 300 233.92.41.21.03.001?
Yes, in 21 mm leather, as long as you don't wear it in the water: leather doesn't like the sea or the pool. For days in the water, rubber. On a 41 mm diver I go for a full-thickness strap, not a thin one. I don't keep rubber ready in 21 mm: write to me and I'll make it.
Which strap do you recommend for the Omega Seamaster 300 233.92.41.21.03.001?
Rubber if you wear it in the water; otherwise a 21 mm calf strap, full thickness. You'll find it ready in the 21 mm collection. If you'd rather have something built on your wrist, the Casati atelier.
The Seamaster 300 233.92.41.21.03.001, seen from the bench
Frequently asked questions
Which strap is most suitable for the Seamaster 300 titanium?
For the Seamaster 300 in titanium, alligator leather represents the most sophisticated formal solution: the natural scales dialogue with the modernity of the metal, and the patina that develops over time tells the story of the watch's use. Alternatively, textile NATO is the radical choice to underscore its underwater military heritage. The ideal strap thickness is 2–2.5mm to maintain the flexibility required by titanium lugs.
Is an aftermarket 21mm strap completely compatible with the 233.92.41.21.03.001?
Yes, any strap manufactured in compliance with DIN 3384 specification with a 21mm lug width is compatible with the Seamaster 300 titanium. However, it is advisable to choose thicknesses between 2 and 2.5mm: overly thick straps may not fit easily into the lugs, while undersized straps may not adhere securely. Atelier Casati Milano personalises every strap based on the exact specifications of your watch.
How long does a leather strap last on an Omega Seamaster 300?
Durability depends on the material and usage. An alligator or vegetable-tanned calf leather, with regular maintenance (occasional cleaning, drying after water exposure), maintains structural functionality for 5–7 years of daily use. FKM rubber guarantees superior durability (8–10 years) as it is not subject to biological degradation. Atelier Casati Milano provides an 18-month warranty on every strap, with the option of regeneration or replacement if necessary.
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
The atelier's website: casatimilano.com