Strap for Seamaster Aqua Terra 150M Co-Axial 34 Yellow Gold / Black / Bracelet

The lug width of model 231.50.34.20.01.001 is 20mm. This dimension corresponds to the distance between the case attachment pins and should be verified with precision when purchasing an aftermarket strap to ensure perfect alignment and avoid lateral play.

Vegetable-tanned alligator is the most versatile choice: the fine grain enhances the case's prestige, while the natural patina dialogues perfectly with the yellow gold's oxidation over time. Shell cordovan offers minimalist elegance and reflects the case's light; grained calf ensures daily sobriety; FKM rubber allows for sport and aquatic use while preserving the precious metal.

The essential tool is a spring bar tool. Position it under the attachment pin, exert light pressure toward the inside of the case to compress the pin spring, then extract it. Repeat on the other side. Verify that the new strap has a 20mm lug width before installation. Reinsert the pins until the spring locking click.

Yes, straps with a 20mm lug width can be equipped with a specific deployant clasp (automatic-action fold-over buckle), available both in artisanal workshops and online collections. The deployant offers daily-use practicality and a more elegant finish compared to traditional manual fastenings.

A quality leather strap (alligator or shell cordovan with vegetable tanning) has an average lifespan of 3-5 years with regular use. Longevity depends on sun exposure, humidity, frequency of use, and maintenance. Atelier Casati Milano offers an 18-month warranty on made-to-measure straps and supports extraordinary maintenance to extend the useful life of your piece.