Strap for Seamaster Aqua Terra 150M Master Chronometer 41 Stainless Steel / Silver / Rubber

The lug width of the model 220.12.41.21.02.002 is 20mm. This measurement represents the exact distance between the case attachment pins. It is essential to verify this dimension before purchasing an aftermarket strap, as an 18mm or 22mm strap will not fit correctly and could damage the lugs of the watch.

For this versatile line we recommend alligator for formal wear (black, dark brown colors), vegetable-tanned calf for daily use (cognac, natural beige), and shell cordovan for those desiring a patina that evolves over time. For aquatic and sports use, a rubber or NATO strap offers superior practicality and durability without compromising the minimalist aesthetics of the watch.

The strap is changed by unscrewing the attachment pins (spring bars) using a specific Y-shaped or lever tool. Position the watch securely, insert the tool into the space between the strap and the case, and gently push inward to release the pin. Remove the old strap and insert the new one by aligning the pin with the opening. If you are not experienced, Casati Milano offers a quick strap change service in our atelier.

Yes, any 20mm strap is mechanically compatible. However, we recommend choosing a solution that respects the aesthetic identity of the watch: avoid excessive thickness (over 4-5mm) that throws off the proportions, and opt for natural, finished leathers that dialogue with the brushed steel case. High-quality artisanal straps maintain the value of the watch over time.

A fine leather strap (alligator, cordovan, quality calf) typically lasts 3-5 years of daily use, with a possible extension to 7-8 years if rotated with other straps. Longevity depends on humidity exposure, temperature, and maintenance. Rubber and NATO straps maintain their characteristics for 5-10 years, proving more resistant to daily wear and aquatic exposure.