Strap for Seamaster 120M Quartz 36.25 Stainless Steel / Silver / Bracelet

The lug width of the Seamaster 120M 2511.21.00 is 18 mm. This standard was typical for wristwatches of this size during the 1990s. Correct measurement means verifying the distance between the pins at the case extremities, from point A to point B, perpendicular to the surface. A quality strap must accommodate the original Omega pins without excessive play but also without forcing that could damage the mechanism.

Louisiana alligator represents the ideal formal choice for this model: the natural grain texture imparts understated elegance and the leather ages magnificently. Alternatively, shell cordovan offers unmatched compactness and shine, developing a deep patina with use. For a more versatile purpose, vegetable-tanned calf provides robustness and a fascinating patina in the first months. For daily use, natural rubber replicates the original sports straps without compromising minimalist aesthetics.

The watch pins must be extracted with a specific tool (straight or spring pins, depending on the model). On a Seamaster 120M, the pins are generally welded spring pins. It is advisable to consult an expert or a specialized atelier such as Casati Milano to avoid damage to the case. The new strap must have a lug width of 18 mm and a tolerance of ±0.2 mm to ensure proper fit and pin longevity.

Yes, the 2511.21.00 model is compatible with all straps with an 18 mm lug width. However, the strap quality must be proportionate to the watch's status: superior quality alligator, certified shell cordovan, or vegetable-tanned calf will ensure longevity and aesthetic aging. On MilanoStraps you will find a curated collection of 18 mm straps customizable in sizes, initials, and stitching thread.

A superior quality alligator or shell cordovan strap lasts on average 4-6 years of moderate daily use, developing a patina that increases aesthetic value. Vegetable-tanned calf has a slightly shorter lifespan (3-4 years) but with a more pronounced patina. Natural rubber resists 5-7 years without loss of elasticity. Longevity depends on: frequency of use, moisture exposure, maintenance regularity (cleaning, conditioning), and the quality of the initial leather treatment. The Casati Milano atelier offers an 18-month warranty on all manufactured straps.