Strap for Seamaster Aqua Terra 150m Co-Axial 41.5 Day-Date Stainless Steel / Red Gold / Grey

The lug width of this model is 20 mm. This measurement is essential when purchasing any aftermarket strap compatible with the watch and is measured between the two lugs (attachments) of the case. Do not confuse the lug width with the internal passage, which varies in depth but does not affect strap compatibility.

For a two-tone Red Gold/Steel watch like the 231.23.42.22.06.001, vegetable-tanned alligator represents the most coherent choice. Authentic alligator with regular grain communicates elegance without excess and develops a golden patina with age. Valid alternatives include Hermès calf for superior softness, shell cordovan if you expect humid or marine environments, and quality fabric NATO straps for a more casual approach.

The Omega Aqua Terra 231.23.42.22.06.001 is equipped with standard spring bar attachments. Using a dedicated tool (spring bar tool), gently compress the internal spring of the spring bar and slide the strap out from the case. Insert the new 20 mm strap by aligning the lateral holes with the case lugs, then release the spring. Ensure the strap is properly positioned on both sides before wearing the watch.

Any strap with a 20 mm lug width is theoretically compatible with the 231.23.42.22.06.001. However, we recommend verifying the internal passage (depth) and finish: a leather strap with 4.5-5 mm depth and refined finishes pairs better with the elegance of the two-tone case compared to bulky sports straps. Milanostraps offers customizable 20 mm straps both online and through atelier consultation.

A quality leather strap (alligator, Hermès calf, shell cordovan) on a regularly worn watch lasts an average of 3-5 years. Durability depends on climate (humidity and heat accelerate aging), frequency of wear, and maintenance care. Vegetable-tanned leathers and shell cordovan age better and maintain aesthetic appeal longer. Casati Milano provides an 18-month warranty on all custom straps and offers reconditioning services.