Strap for Seamaster Aqua Terra 150M Master Chronometer 41 Beijing 2022

The lug width is 20mm. This measurement is obtained by inserting a metal ruler between the lateral lugs of the case. It is essential to use straps specifically sized to 20mm, as 18mm or 22mm straps will not fit correctly into the watch's lugs.

Vegetable-tanned alligator offers maximum formal elegance with a natural patina that develops over time. Shell cordovan guarantees superior density and resistance to daily wear with a refined aesthetic profile. Vegetable-tanned calfskin provides chromatic versatility (cognac, black, grey) and is ideal for those who frequently rotate strap combinations. Silicone rubber straps remain the practical choice for humid environments or light sporting activities.

To replace the strap, obtain a dedicated spring bar tool. Position the forked tip of the tool on one of the lateral lugs of the case, apply light pressure inward to compress the spring bar, then extract the bar from its seat. Repeat the operation on the other side. Insert the spring bars of the new 20mm strap into the watch's lugs, verifying that they are fully seated. If you desire a custom strap with precise measurements, contact the Casati Milano atelier for a bespoke consultation.

All universal straps with a 20mm lug width are compatible, regardless of brand. Lug width is the only relevant technical parameter. On milanostraps.it you will find a selection of straps in alligator, cordovan, calfskin and rubber in various shades and finishes, all tested for the Aqua Terra and available in standard or custom versions with lengths adapted to your wrist.

A quality artisanal leather strap, worn daily under normal conditions, maintains structural integrity for 3-5 years. Shell cordovan, thanks to its superior molecular density, can exceed 7 years of intensive use. Longevity depends on body perspiration, direct sun exposure and cleaning frequency. Alligator or vegetable-tanned calfskin straps require periodic maintenance (conditioning with specific products) to preserve elasticity and patina. The Casati Milano atelier offers an 18-month warranty on artisanal straps and can regenerate damaged leather through specialized treatments.