Strap for Seamaster Aqua Terra 150m Master Co-Axial 41.5 Stainless Steel / Black / Green

The lug width of reference 231.12.42.21.01.003 is 20mm. This dimension corresponds to the distance between the two spring bars that connect the strap to the case at the attachment point. To verify it manually, gently extract the spring bars from the case lugs and measure the space between the two inner holes. A measurement error could compromise the strap fit.

For this model we recommend vegetable-tanned alligator (develops patina over time), shell cordovan (deep glossy effect), or soft calf for everyday elegance. Dark moro alligator or cognac brown pairs perfectly with the teak dial. If you prefer sportiness, opt for a black FKM rubber strap or Cordura textile NATO strap, both water-resistant.

Position the watch on a soft surface with the dial facing down. Locate the small hole at each lug on the case. Insert a spring bar tool into the hole, gently press to release the internal spring of the bar, then extract it. Repeat on the other side. Remove the old strap and insert the new one by threading the spring bar on one side first, then gently compressing to insert the other end into the spring.

Any strap with a 20mm lug width is compatible with your Omega Aqua Terra. Online at milanostraps.it you will find a selection of artisanal straps in various leathers (alligator, calf, cordovan, rubber) and styles (classic, sporty, casual), all ready for shipment and customizable in length, initials and stitching thread.

Durability varies based on material and usage: calf has an average lifespan of 2-4 years with daily use, alligator and cordovan can reach 5-7 years thanks to greater natural fiber resistance. FKM rubber lasts 4-6 years. NATO textile strap can exceed 8 years. Factors such as exposure to sweat, humidity and sun affect durability. Casati Milano includes an 18-month warranty on all made-to-measure straps.