Strap for Seamaster Aqua Terra 150M Co-Axial 36.2 Yellow Gold / Silver

The lug width of the 2604.30.37 is 20mm. This measurement represents the internal distance between the two lugs on the case where the strap is attached. To verify it, use a digital caliper positioned in the groove of the lugs, excluding the locking spring. Only straps certified at 20mm are compatible with this model.

For the 2604.30.37 in yellow gold, the best combinations are: vegetable-tanned alligator in brown or blue tones, shell cordovan with natural patina, French calf in burgundy or black, or black rubber for sporty use. Yellow gold pairs well with straps in dark and neutral colors, creating aesthetic balance without chromatic excess.

The strap is changed by removing the lug pins with a specialized tool or a diamond point mounted on a spring bar tool. Pull out one pin at a time, in a direction parallel to the dial, avoiding rotational movement that could scratch the case. Insert the new strap by aligning the hole to the lug and reinsert the pin until the locking click. This operation requires precision and, if you are inexperienced, consult a professional.

Yes, provided the aftermarket strap is certified at 20mm lug width and the constructive tolerances are correct. Milano Straps offers a complete collection of 20mm straps in artisanal leather, rubber, and fabric, verified for geometry and mechanical compatibility with the 2604.30.37. Exclusively for your timepiece, the Casati Milano atelier also creates custom bespoke straps made to measure.

A high-quality leather strap with vegetable tanning or shell cordovan typically lasts 4-7 years with daily use, depending on exposure to moisture, direct sunlight, and cleaning frequency. French calf tends to age more quickly but develops an aesthetic patina. Alligator and shell cordovan offer greater longevity. Milano Straps provides an 18-month warranty on custom-made straps from Casati Milano, with repair and renewal options available.

The integrated original bracelet of the 2604.30.37 in solid gold is removable using standard spring bar tools, as the links are anchored to the lug pins. However, the structure is designed for that specific strap. When you replace it with a leather or rubber strap, you must ensure that the lug width (20mm) and the strap thickness are compatible with the case geometry.