Strap for Seamaster Aqua Terra 150M Co-Axial 43 Annual Calendar Stainless Steel / Silver

The lug width of model 231.13.43.22.02.003 is 21mm. This measurement refers to the thickness of the leather between the two lugs of the case. It is essential to measure internally the original strap to verify the exact value before purchasing an alternative.

For the Aqua Terra 231.13.43.22.02.003, alligator represents the most harmonious choice: the regular grain of the leather echoes the geometry of the case, while the patina developed over time creates dialogue with the steel. Vegetable-tanned calf offers tactile softness and more pronounced chromatic evolution; shell cordovan adds luxury with its natural reddish-brown hue and superior density.

The strap is removed by extracting the spring bars that connect the lugs to the case lugs. It is advisable to use a specific tool (spring bar tool) to avoid damage. The new strap must have a lug width of 21mm and must be inserted with the spring bars maintaining constant tension between the lugs, without radial play.

An original Omega strap for the 231.13.43.22.02.003 is manufactured according to the brand's internal construction standards, with certified finishes and materials. Compatible aftermarket straps, such as those available on MilanoStraps, offer the same lug width (21mm) and high construction quality, allowing choice of exotic materials (alligator, shell cordovan) and customization in sizes, initials, and thread colours not always available in the official catalogue.

Durability depends on frequency of wear, climate, and maintenance. A high-quality alligator or calf strap, subjected to moderate daily use, maintains structural integrity for 4-6 years before showing visible wear. Humid climates or frequent water exposure (although the Aqua Terra is water-resistant to 150m) accelerate aging. Quality leather straps develop unique patina and colour over time, making wear part of the watch's story.