Strap for Seamaster Aqua Terra 150m Master Co-Axial 41.5 Stainless Steel / Red Golf / Silver

The Omega Aqua Terra 231.23.42.21.02.001 has a lug width of 20 millimeters. This is the exact distance between the lugs (connecting pins) on the case. To verify the compatibility of a new strap, measure with a digital caliper the external distance between the two lugs: it must be exactly 20 mm for precise mounting and without any lateral movement.

A cognac or dark brown alligator represents the most elegant choice, amplifying the contrast with the rose gold case. Alternatively, a deep blue vegetable-tanned calf maintains sobriety, while shell cordovan offers a patina that evolves over time. For actual marine use, a black FKM rubber with gold stitching is the most practical and resistant solution.

Remove the original strap using a small lever (spring bar tool) to push the pin downward on one side. Once the pin is removed, slide the old strap out of the case. Insert the new strap into the lug slots and, holding it firmly, reinsert the pin until you feel the snap click. Check that the strap does not oscillate laterally.

Yes, provided the strap has exactly 20 mm lug width. Artisanal straps produced by Milano Straps are specifically constructed for this size and offer alternatives in premium leathers such as alligator, calf, shell cordovan and FKM rubber, with custom personalizations available at the Casati Milano atelier.

A premium leather strap subjected to moderate wear (worn 4-5 days a week) has a durability of 3-5 years before requiring replacement. Shell cordovan and alligator age better than standard calf, developing a desirable patina. Periodic maintenance with gentle cleaners significantly extends service life. Milano Straps straps include an 18-month warranty against manufacturing defects.