Strap for Speedmaster Professional Galaxy Express

The Omega Speedmaster Moonwatch 3571.50.00 features a lug width of exactly 20 millimetres. This measurement is Omega's standard construction specification for the Moonwatch series sports chronographs and requires specific 20mm straps for correct fitting to the spring bar lugs.

Alligator with regular texture remains the most visually coherent choice: the leather geometry mirrors the clean dial design. Vegetable-tanned calf is the solution for those seeking character and natural aging, while the Tropic rubber strap is ideal for adventure wear. Black alligator with pearl-grey stitching represents the most versatile classic configuration.

The 3571.50.00 uses spring bar lugs. Using a spring bar tool, engage the release mechanism from the lateral holes in the case, retracting the springs. Gently remove the old strap by rotating it downward. Insert the new strap by pushing the lug ends into the corresponding holes until they click into place. Never use sharp tools that could scratch the stainless steel case.

Yes, any bespoke strap with a 20mm lug width is compatible with the 3571.50.00, provided it has been measured correctly. Custom straps from milanostraps.it also allow micro-adjustments to the width (19.8–20.2mm) if necessary, guaranteeing a perfect fit without play between case and leather.

A high-quality bespoke alligator strap lasts 3–4 years of moderate daily wear before requiring replacement. Vegetable-tanned calf tends to last 2–3 years as it is more porous, but develops a desirable patina. Tropic rubber has a longevity of 4–5 years if stored correctly. Actual durability depends on frequency of use, exposure to water, perspiration, and direct sunlight.