Strap for Seamaster Aqua Terra 150m Master Co-Axial 41.5 Stainless Steel / Silver / Bracelet

The lug width of the 231.10.42.21.02.003 is 20 mm. This is the distance between the two attachment pins of the strap on the case. It is essential to verify this dimension when purchasing an aftermarket strap to ensure perfect compatibility.

High-quality black or dark blue alligator offers maximum nautical elegance. Alternatively, vegetable-tanned calf leather ensures patina evolution over time, or a technical rubber strap (FKM) for sport-elegant versatility. The choice depends on the context of use and personal aesthetic preferences.

Changing the strap requires a specific tool (spring bar remover) to extract the pins from the lug holes. Position the watch on a protected surface, use the tool to gently push the pin until it is extracted, insert the new strap by threading its lug under the pin, and snap the pin into place. If inexperienced, it is advisable to contact an authorized service center.

Yes, any strap with a 20 mm lug width is compatible with the 231.10.42.21.02.003, regardless of the watch brand. However, aesthetic and constructive considerations (total length, thickness, style) may vary. Milano Straps offers customizable 20 mm straps to fit your watch perfectly.

A high-quality leather strap, with vegetable tanning, typically lasts 3-5 years with daily use, with variability based on climate, sun exposure, and humidity frequency. Genuine alligator or selected calf can extend the lifespan to 6-7 years. Casati Milano offers an 18-month warranty on bespoke straps, with assistance for maintenance and replacement.