Strap for Seamaster Aqua Terra 150M Shades Master Chronometer 38 Stainless Steel / Lavender / Bracelet

The lug width measures 19mm. This is a specific characteristic of this model, not interchangeable with the more common 20mm. Always measure the distance between the case lugs before purchasing an aftermarket strap.

There is no absolute best, but three noble choices: brown alligator for uncompromising elegance, vegetable-tanned calfskin for a patina that evolves over time, FKM rubber for daily technical applications. The choice depends on use and personal aesthetics.

Position the watch with the case facing upward. Use a spring bar tool to lift the small elastic pin (spring bar) that connects the strap to the case. Once one side is unlocked, remove the pin and the old strap. Position the new strap and reinsert the spring bar. Casati Milano also offers this service in their atelier.

Any strap made for 19mm lug width is compatible. On milanostraps.it you will find a dedicated selection of leather, fabric and rubber in the 19mm category, all tested for this specific model.

A quality leather strap, with vegetable tanning or natural alligator, lasts 3-5 years with regular use. Durability depends on exposure to humidity, sweat, and frequency of wear. FKM rubber lasts longer (7-10 years), cotton NATO even more. Casati Milano offers 18-month warranty on all custom-made straps.