Strap for Seamaster Aqua Terra 150M Co-Axial 43 GMT Stainless Steel / Red Gold / Grey / Bracelet

The lug width of the Omega Aqua Terra 231.20.43.22.06.003 is exactly 20 millimetres. This dimension is specific to this model and differs from the larger Seamaster models that feature 22mm lugs. It is essential to measure correctly the distance between the two case terminals to avoid errors when purchasing an aftermarket strap.

The choice depends on usage and context. For a dressy and formal interpretation, an alligator leather in vegetable tanning enhances the Red Gold case. For a sporty approach, a structured calf leather with natural grain creates technical contrast. An FKM rubber strap is ideal for real nautical environments, while a NATO canvas strap offers maximum daily versatility. Some collectors adopt a modular approach with multiple straps, varying depending on the occasion.

The strap is changed using a spring bar remover tool (a tool to extract the elastic pins that secure the strap to the lugs). Position the tool horizontally under the lug, press gently downward to compress the spring bar, and the strap will release. Repeat for the other side. The operation is straightforward but requires care not to scratch the case, especially if it is in Red Gold. Many owners prefer to have it done by a specialized atelier.

Any strap sized at 20 millimetres lug width is compatible, provided the dimensions are precise and the strap is made with construction quality appropriate to the case value. On milanostraps.it you will find a range of artisanal 20mm customizable straps in material (alligator, calf, shell cordovan, rubber), colour, length and details such as initials and stitching thread. The Casati Milano atelier also creates bespoke straps entirely tailored to the owner's personal preferences.

Durability depends on the material, frequency of use and environmental conditions. A quality alligator or calf leather, with vegetable tanning, typically lasts 3 to 5 years if worn daily, longer if worn occasionally. Exposure to direct sunlight, humidity and salt spray accelerates ageing. Straps made by specialized artisans, such as those by Casati Milano, include an 18-month warranty. When the strap begins to show structural weakness, its replacement is simple and does not compromise the watch's value.