Strap for Seamaster Aqua Terra 150M Master Co-Axial 38.5 Stainless Steel / Yellow Gold / Diamond / MOP / Bracelet

The Omega Seamaster Aqua Terra 231.25.39.21.55.002 has a lug width of 20 millimeters. This is the space between the two lugs of the case where the strap is attached. It is crucial to use straps with exactly 20mm lug width to ensure proper fit in the metallic seats of the case.

For this two-tone yellow gold-steel model with mother-of-pearl dial, alligator leather remains the choice of excellence: its regular grain elegantly complements the precious materials of the case. Premium alternatives include shell cordovan (for natural shine) and vegetable-tanned calf leather (for authentic patina). Standard synthetic straps are not recommended, as they diminish the character of this model.

Remove the watch from your wrist and place it on a soft surface. Using a spring bar tool or small screwdriver, gently press inward to release the spring bar from its seat. Pull the old strap from the end, then insert the new strap by aligning the hole with the lug pin and press until you hear a click of security. Repeat on both sides.

The original Omega strap for this model, being 20mm, is not compatible with watches requiring different sizes (18mm, 19mm, 21mm, 22mm). However, an aftermarket 20mm strap can be universally adapted to any watch with the same lug width, opening up unlimited customization possibilities.

A quality leather strap (alligator, calf, shell cordovan) with proper tanning and artisanal stitching typically lasts 3-5 years of regular use, considering that the section in contact with the wrist experiences the most wear. Durability increases significantly if the watch is alternated with other timepieces and the strap is not constantly exposed to sweat and humidity. Custom finishing and regular maintenance further extend the operational lifespan.