Strap for Speedmaster Professional Moonwatch Apollo 11 40th Anniversary

The Omega Speedmaster Professional 311.30.42.30.01.002 has a lug width of 20 millimeters. This is the standard size for the entire reference and defines the compatibility of any strap. To verify with precision, measure the space between the two lugs of the case using a digital caliper: the value must be exactly 20 mm.

It depends on use and aesthetics. For a classic formal-chronographic image, we recommend black alligator or brown shell cordovan: the uniform grain dialogues with the minimalist dial design. For sportiness and versatility, an anthracite-gray NATO strap or vegetable-tanned chestnut calf leather offer visible aging and flexibility. For intense nautical use, a vulcanized rubber strap eliminates moisture absorption.

The 311.30.42.30.01.002 uses standard spring bar attachments. You need a small lever or spring-pin tool: insert it into the lateral spaces of the lower attachment until the spring releases, remove the bar, take off the old strap. Position the new strap, insert the bar one end at a time ensuring both springs snap into place. Verify the attachment by gently pulling the strap downward.

Any strap with a 20 millimeter lug width is compatible. Online you will find straps in vegetable-tanned leather, alligator, calf, cordura NATO, rubber, and linen. Always verify that the total width is 20 mm (not 18 or 22 mm) and that the strap is cut straight, without rounded edges at the ends. Many excellence brands produce premium straps specifically for the Moonwatch.

A quality leather strap (calf, alligator, shell cordovan) lasts 3–5 years with moderate daily use. Durability depends on environmental factors: high humidity (maritime environments) accelerates wear; dry conditions slow it down. A vegetable-tanned calf strap develops a protective patina over time, increasing functional life. Cordura NATO straps last 7–10 years. Vulcanized rubber does not age and lasts indefinitely if kept clean.