Strap for Seamaster Aqua Terra 150M Co-Axial 36.2 Yellow Gold / Diamond / MOP / Bracelet

The lug width of the 2104.75.00 is 20mm. This measurement is taken by positioning a ruler orthogonally between the inner edges of the two lugs (the metal spring bars of the case). Verify with precision before purchasing an aftermarket strap, as even a 1mm discrepancy will cause incompatibility.

Dark brown or burgundy alligator is the most natural aesthetic choice: the fine grain does not compete visually with the gold and enhances the silvered dial. Alternatively, a mahogany shell cordovan tone offers rich patina and aging synchronized with the golden case. For maritime contexts, vegetable-tanned calf ensures moisture resistance.

The strap is removed using a spring bar remover (a thin lever specifically designed for this purpose): insert the tip into the recessed area of the spring located beneath each lug, lift gently to disengage it from the pins, then extract the worn strap. Insert the new strap by aligning the lateral holes with the lug pins and push until you hear the spring lock click. Avoid forcing to prevent scratching the case.

Yes, provided the width is exactly 20mm and the thicknesses at the ends (lugs) do not exceed 4mm. Verify that the strap is constructed with a short lug version for this specific case diameter to avoid overhang on the wrist. Milano Straps 20mm straps are verified for total mechanical compatibility.

A high-quality alligator or shell cordovan strap lasts an average of 4–6 years with daily use, 7–10 years with occasional use. Lifespan depends on sun exposure, ambient humidity, and cleaning frequency. Casati Milano straps offer an 18-month warranty on construction and stitching; patina and natural aging do not constitute defects but rather ennoble the material aesthetically.