Strap for Seamaster Aqua Terra 150m Master Co-Axial 41.5 Red Gold / Grey / Bracelet

The lug width of the Omega Aqua Terra 231.50.42.21.06.002 measures exactly 20mm. This measurement represents the internal space between the two lugs of the case and is essential for selecting a compatible strap. Any strap with a different lug width (18mm, 22mm) will not fit correctly on the case.

For the Aqua Terra 231.50.42.21.06.002 in rose gold, we recommend a dark brown or cognac alligator strap, which amplifies the warmth of the gold and develops a beautiful patina over time. An elegant alternative is vegetable-tanned calf leather in burgundy, which creates contrast without clashing. Black rubber remains the most versatile choice for daily sporty use.

The strap is changed by removing the spring bars that connect the strap to the case. Equip yourself with a specialized tool (lever or pressure type) to compress the spring bar slightly and slide it out from its seats. Position the new strap, reinsert the spring bar into the case holes—feeling the click lock—and verify that it is secure. If inexperienced, consult a qualified strap specialist.

Yes, provided the strap has an exact 20mm lug width and the ends are correctly proportioned to the 41.50mm case. Quality aftermarket straps—such as those made by Casati Milano or available in the collection on milanostraps.it—meet these standards and guarantee coherent aesthetics without compromising on construction.

Durability depends on the material and usage. A quality alligator strap typically lasts 3-5 years if worn daily; vegetable-tanned calf leather has similar longevity. Rubber is more resistant (5-7 years). Factors such as perspiration, sun exposure, and frequency of wear affect durability. Rotating multiple straps extends the life of each one. Casati Milano straps include an 18-month warranty.