Strap for Seamaster Aqua Terra 150M Co-Axial 30 Stainless Steel / Red Gold / MOP / Bracelet

The lug width is 20mm. This measurement represents the distance between the two case attachment pins. To verify it correctly, measure with a millimeter caliper between the two lateral holes where the pin is housed: the value should be 20mm internal. Any 20mm strap is compatible with the 231.20.30.20.55.001.

French alligator is the optimal choice for opalescent mother-of-pearl and rose gold: the unmarked grain creates a refined tactile dialogue. Recommended shades: cognac brown, pure black or burgundy. Valid alternative: shell cordovan that ages naturally, or vegetable-tanned calf leather for seasonal color versatility.

Changing the strap on this model requires extraction of the lateral attachment pins. Equip yourself with a spring bar tool: insert the bifurcated tip under the pin, apply upward pressure to compress the internal spring, extract the pin laterally. Repeat on the other side. For installation, reverse the procedure: align the new strap and insert the pins until the click closure.

Yes, any strap with a 20mm lug width is mechanically compatible. Always verify that the strap has been manufactured for your wrist (measure length in cm) and that the attachment pins are correctly sized for the case. Dedicated straps guarantee maximum comfort and impermeability at the attachment level.

A premium leather strap (alligator, shell cordovan, vegetable-tanned calf) guarantees 3-5 years of daily use with proper maintenance. Wear depends on exposure to moisture, dust and frequency of use. The Casati Milano warranty on custom straps is 18 months, covering manufacturing defects. Beyond that period, replacement becomes advisable for aesthetic rather than functional reasons.