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Omega · Seamaster 300

Strap for Seamaster 300 Master Co-Axial Stainless Steel / Black / Strap

Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

21mm
21 mm strapsAll Omega
Lug width21 mm
Case diameter41 mm
Reference233.32.41.21.01.002 (aka: 23332412101002)
FamilySeamaster 300
MovementOmega caliber 8400 hours, minutes, seconds | chronometer, co-Axial escapement
Year2015 - 2021
CaseStainless Steel

Recommended spring bar

Omega Spring Bars 21mm — Single Diameter

Technical match for lug width and diameter · lug 21 mm · Ø 1.8 mm

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Straps for the Seamaster 300 233.32.41.21.01.002 (aka: 23332412101002)

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Seamaster 300 233.32.41.21.01.002 (aka: 23332412101002), seen from the bench

The Seamaster 300 Reference 233.32.41.21.01.002 represents the contemporary evolution of an icon born in 1957 when Omega equipped British intelligence agents with an uncompromising diver's watch. This 41mm model features a stainless steel 316L case rated to 300 meters, screw-down caseback, and deep blue dial. The Omega 8400 co-axial calibre is a Chronometer-certified movement with co-axial escapement that reduces jewel wear and ensures stable precision. The 21mm lug width is ergonomically calculated for this case size. The watch includes an anti-reflective sapphire crystal and unidirectional ceramic bezel with 60-minute timing.

Frequently asked questions

What is the lug width of the Omega Seamaster 300 Reference 233.32.41.21.01.002?

The lug width is 21mm, a non-standard size that requires specific aftermarket research. Verify by measuring the flat shoulder between the spring bar coils: if you obtain exactly 21 millimeters, any strap with a standard 21mm deployant clasp or buckle will be compatible.

Which strap material is best suited for the Seamaster 300 233.32.41.21.01.002?

Vegetable-tanned alligator is the choice of excellence: the natural grain and patina that develops over time enhance the wave blue dial. Valid alternatives include English calf for discretion, shell cordovan from horsehide for salt-water resistance, and NATO nylon for high-stress sports situations.

How do you change the strap on the 41mm Seamaster 300?

The Seamaster 300 uses standard spring bars: remove the spring bar from the original lug using a dedicated spring bar tool, slide the spring bar into the lug slot of the new strap and reinsert it into the other lug of the case. Ensure that the spring bar ends snap firmly into place, avoiding play that could compromise the watch's accuracy.

Is there an aftermarket strap guaranteed compatible with reference 233.32.41.21.01.002?

Yes: online straps with 21mm lug width are guaranteed compatible. Milano Straps offers ready-to-stock straps customizable in leather, length and stitch color, plus artisanal bespoke service through Casati Milano with leather selection and 18-month warranty.

How long does a leather strap last on a Seamaster with 300-meter water resistance?

A good-quality vegetable-tanned strap lasts 3–5 years with daily wear, varying with frequency of fresh-water immersions and perspiration. Salt water shortens its life to 2–3 years; for this reason divers prefer shell cordovan straps (more resistant) or NATO nylon. Consistent maintenance (quick drying after water contact) significantly extends longevity.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only