Strap for Seamaster Aqua Terra 150M Master Co-Axial 34 Stainless Steel / MOP / Bracelet

The lug width of this model is exactly 20mm. This specification is crucial to ensure correct strap attachment in the case lugs. Always verify by measuring the distance between the two lugs with a digital caliper, from shoulder to shoulder, to ensure complete compatibility with your aftermarket strap.

Vegetable-tanned alligator is the optimal choice for this model. Its natural grain and ability to develop patina over time pair perfectly with the vintage-modern aesthetics of the teak dial. Structured calf leather is an excellent secondary alternative for those seeking greater chromatic versatility and daily durability.

The change is straightforward: use a spring bar removal tool (or a thin flat blade) to compress the small spring inside the lug. Lift carefully until the strap is released. Repeat on the other side. For installing the new strap, insert the spring bar into the lug holes and slide the strap into the lug, releasing pressure when aligned. Verify that the spring is fully seated.

Yes, provided tolerances are respected. An aftermarket 20mm strap may be compatible, but even minor variations (±0.2mm) in spring bar diameter or lug width can cause difficult insertion or instability. We recommend relying on brands specialized in respecting Omega standards or requesting bespoke adjustments such as those offered by Casati Milano.

A quality alligator or calf strap, with ordinary maintenance, lasts an average of 3-5 years of daily use. Durability depends on usage intensity, ambient humidity, and periodic care. A vegetable-tanned strap develops patina but requires more maintenance. Casati Milano provides an 18-month warranty and offers regeneration services and lug replacement to extend your strap's life.