Strap for Seamaster 120M Automatic 25 Stainless Steel / Blue

The Omega Seamaster 120M 2581.81.00 has a lug width of 20mm. This measurement is the internal distance between the two spring bar attachments of the case and remains constant regardless of the strap length, which must be customized based on your wrist circumference.

For this classic model from the Seventies, we recommend artisanal quality alligator for a formal and elegant look, or Italian calf leather with vegetable tanning for those who want a rich patina that improves over time. For a more sporty approach, a canvas NATO strap or a technical rubber strap highlight the technical character of the watch.

The strap is replaced using a spring bar tool. Locate the side slots on the case where the spring bars are housed, gently insert the tool, release the spring and slide off the old strap. Then insert the new strap by snapping the attachments into the case slots. If you prefer, Casati Milano offers a strap replacement service by appointment.

Yes, as long as the strap has a certified lug width of 20mm. Quality aftermarket straps (in alligator, calf, NATO or rubber) are perfectly compatible with the 2581.81.00 and often offer more aesthetic versatility than the original bracelet. Always verify that the measurement is exactly 20mm.

A quality artisanal leather strap (alligator or vegetable-tanned calf) typically lasts 4-6 years with daily use, developing a beautiful patina over time. Durability depends on use, climate and care: protect the strap from prolonged saltwater and extreme humidity. Casati Milano offers an 18-month warranty on all bespoke straps.