Strap for Seamaster Aqua Terra 150m Co-Axial 43 Annual Calendar White Gold / Grey

The Omega Aqua Terra 231.53.43.22.01.001 has a lug width of 21mm. This width is specific to this model and is compatible with all 21mm straps from the milanostraps.it collection. Measure the lug width by positioning a caliper between the inner poles of the slots to verify the exact width of the space intended for the strap.

For this 43mm white gold watch, we recommend a matte-finished European alligator in tobacco or cognac brown tones, which creates an elegant contrast with the cool metal. Alternatively, vegetable-tanned calf leather that develops patina over time, or shell cordovan for those seeking maximum refinement. For marine contexts, a linen-cotton NATO or FKM rubber ensures functionality.

The strap is replaced by removing the two lateral spring bars that connect the lug to the case. Use a dedicated tool, the spring bar remover, to push the pin inward and extract it from the lug. Then insert the new strap by aligning the lug holes with the spring bar poles and press until it clicks. The operation requires care to avoid damaging the internal slots.

Any strap with a 21mm lug width is compatible with your Omega. milanostraps.it offers a complete collection of 21mm straps in alligator, calf, shell cordovan, aniline-dyed leather, rubber, and NATO. Verify that the strap has internal holes aligned to 21mm and ensure you have a spring bar remover for installation.

Durability depends on the type of leather and usage. A European alligator or shell cordovan lasts 5-7 years if worn daily. Vegetable-tanned calf leather has similar durability but develops more visible patina. Leather is a living material: humidity, perspiration, and sun exposure accelerate its aging. Casati Milano guarantees 18 months on custom-made straps, with the possibility of restitching the slots or replacing the damaged section.