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

The 231.10.43.22.01.001 is fitted with a 20mm lug width. This measurement is fixed and does not vary between production batches. Always verify compatibility before purchasing any aftermarket strap to avoid loose attachments or unacceptable lateral play.

Alligator in cognac or dark brown shades is ideal for maintaining stylistic coherence with the Aqua Terra's marine aesthetic. Valid alternatives include shell cordovan (which develops black patina over time) and vegetable-tanned calf leather for those preferring understated elegance. For intensive water use, FKM rubber (Viton) or NATO fabric ensure superior durability.

Use a digital caliper to measure the internal distance between the two lugs of the case, measuring from the bottom of one lug's shoulder to the bottom of the opposite lug's shoulder, perpendicular to the movement. For the 231.10.43.22.01.001, the result must be exactly 20mm. This measurement is critical before ordering a replacement strap.

Yes, provided the strap is constructed with a 20mm compatible attachment. Milano Straps offers 20mm straps online ready for shipping, or you can customize them at the Casati Milano atelier with direct material selection and 18-month warranty.

A quality leather strap, with proper maintenance, lasts 3-5 years under normal conditions. Frequent exposure to sea humidity, chlorine, or perspiration accelerates wear. Vegetable-tanned straps age elegantly, developing patina; alligator resists moisture better. For intensive aquatic environments, rubber or military-grade fabric offer superior longevity with minimal aesthetic compromise.