Strap for Seamaster Aqua Terra 150M Quartz 36.2 Stainless Steel / Black / Bracelet

The lug width of the 2518.50.00 is 20 millimetres (measured inside-to-inside of the spring bar pins). This specification is essential to guarantee compatibility with any aftermarket strap. Always measure centre-to-centre of the metal axes on the case lugs, not from the outer edge.

For the 2518.50.00 we recommend premium alligator in medium-dark brown, vegetable-tanned calf in cognac, or Horween shell cordovan. The choice depends on usage: alligator for formal occasions, calf for refined daily wear, cordovan for those seeking maximum durability. We advise against NATO fabric straps, which would diminish the elegance of the case.

Strap removal requires a spring bar tool. Gently lift the pin from the lower position, maintaining pressure until it disengages from the lug holes. Insert the new strap and reinsert the pin until you feel the click. If you are not experienced, entrust the task to a watchmaker or contact Casati Milano.

No. A leather strap, even vegetable-tanned or high-end, cannot withstand prolonged immersion. If you wear the 2518.50.00 in recreational water environments (swimming, snorkelling), alternate with an FKM rubber strap or the metal bracelet. Leather deteriorates in excessive moisture even if you avoid direct immersion.

Durability depends on the leather type and usage. Premium alligator under normal conditions (not exposed to excessive perspiration, prolonged humidity, direct sunlight) lasts 3–5 years. Vegetable-tanned calf tends toward 4–6 years. Shell cordovan can exceed 7 years. Milano Straps guarantees 18 months; beyond this period natural deterioration is inevitable even with premium leathers.