Strap for Seamaster Aqua Terra 150M Co-Axial 38.5 White Gold / Diamond / Silver

The lug width is 20mm. This width is specific to this model and is essential for choosing a compatible strap. Always verify the space between the case attachment and the inner edge of the spring bar to avoid excessive lateral play.

For a white gold watch with a grey-blue dial, alligator is the most versatile choice. Ideal colors are black, dark blue, and cognac brown. Alligator offers elegance without competing with the brilliance of white gold. For those who appreciate patina evolution, vegetable tanning is an excellent alternative.

The strap is replaced by removing the spring bars with a dedicated tool. Start from one side, insert the tip of the spring bar remover into the small opening and lift gently. Wait for the bar to retract, then remove the old strap and insert the new one, ensuring the bar clicks correctly into position.

Yes, any strap with a 20mm lug width is compatible with the 231.58.39.21.52.001, provided the keeper is not too wide and does not leave lateral play exceeding 0.5mm. The quality of the leather and strap construction will determine the durability and aesthetics of the pairing.

The lifespan of a leather strap depends on the tanning and usage. A quality alligator can last 3-5 years with moderate daily use. Shell cordovan resists up to 7-8 years thanks to its density. Vegetable tanning has a lifespan similar to alligator, but the patina improves over time. Casati Milano atelier provides an 18-month warranty on all custom straps.