Strap for Seamaster Aqua Terra 150M Co-Axial 44 GMT Chronograph Stainless Steel / Grey

The lug width of the 231.13.44.52.06.001 is exactly 20mm. This dimension corresponds to the internal space between the two lugs of the 44mm case. Any compatible strap must be measured with millimetre precision: position it between the lugs and verify that the internal distance is exactly 20mm to ensure fit and secure retention.

Alligator is the preferred material for the 231.13.44.52.06.001: its fine grain and natural lustre resonate with the Teak Concept aesthetic of the silvered dial. Vegetable-tanned calf represents a more rustic alternative that develops patina over time. Shell cordovan offers superior elasticity and natural polish. For intensive aquatic environments, FKM rubber or cordura NATO strap provide practical functionality.

Strap replacement requires removal of the lug from the integrated original bracelet. Use a spring bar tool to disengage the elastic spring that supports the lug at the case lugs. Insert the new strap by aligning the lug to the upper and lower lugs, then reinsert the elastic spring ensuring it clicks securely into place. Always verify that the strap is secured on both sides before wearing the watch.

Yes, any 20mm strap is compatible in terms of lug width. However, verify that the total strap width does not exceed 20mm and that the thickness is suitable for the case lugs. Custom artisanal straps from Milano Straps guarantee perfect compatibility and are available in every material: alligator, calf, shell cordovan.

A quality artisanal leather strap lasts on average 3-5 years of daily use. Durability depends on the material (alligator resists longer than calf), exposure to moisture and perspiration, and maintenance. Vegetable-tanned calf can develop creases from repeated flexing. Shell cordovan is more resistant. Milano Straps guarantees 18 months on bespoke straps, with the possibility of regeneration or replacement of the rear lug.