Strap for Speedmaster Professional Moonphase Broad Arrow Stainless Steel / Ivory

The Speedmaster Moonwatch 3875.20.37 features a lug width of 20mm. This measurement represents the internal space between the two metal lugs of the case. It is essential to verify this dimension before purchasing an aftermarket strap, as an incorrect measurement compromises compatibility and wearing safety.

Alligator is the most recommended choice for this Moonwatch, thanks to the sharp visual contrast of its characteristic texture against the polished finishes of the white gold and steel case. Alternatively, vegetable-tanned calf offers superior tactile softness and greater adaptability to the wrist, with a patina that develops naturally over time.

Changing the strap on the Moonwatch requires the use of a specific tool for removing spring bars (the small pins that secure the strap to the case). Position the spring bar remover under the case lug and apply gentle pressure to push the pin inward, facilitating its extraction. Repeat for both lugs. To ensure precision and protect the case polish, it is advisable to have the operation performed by a professional.

Yes, 20mm aftermarket straps are widely available. It is essential to verify that the <a href="/pages/termine-glossario/misura-ansa">lug width</a> corresponds exactly to the 20mm of the original case. Many manufacturers offer straps in alligator, calf, shell cordovan, and rubber, customizable for color and stitching.

The lifespan of a leather strap depends on the material, usage, and maintenance. Alligator and shell cordovan, if well cared for, maintain structural integrity for 3-5 years of regular use. Vegetable-tanned calf, being softer, has a similar lifespan but requires more careful maintenance in humid environments. Natural rubber maintains elasticity and integrity for 2-3 years before beginning to lose its original properties.