Strap for Speedmaster Professional Moonwatch Apollo XI 25th White Gold

The lug width of the Speedmaster Moonwatch 3692.30.31 is 20mm. This historic dimension represents the standard for high-category wrist chronographs. To verify correctly, measure the internal distance between the two metal lugs of the case: it should be exactly 20mm. This measurement ensures compatibility with the wide selection of artisanal straps available online.

For the white gold 3692.30.31, we recommend a dark brown alligator strap for formal elegance, or vegetable-tanned cognac leather if you desire natural patina development over time. For a sports context, an intense burgundy shell cordovan strap or an anthracite gray NATO represent versatile choices. The color pairing must consider the black-and-white contrast of the dial: avoid colors that compete with this iconic legibility.

The 20mm lug on the 3692.30.31 is disconnected by gentle pressure on the internal spring bar: use a dedicated tool with 1.5mm diameter inserted gently under the spring from the side you wish to push. Never force with heavy metal tools that could scratch the white gold case. Artisanal straps typically include an illustrated guide; for added safety, entrust the professional installation to Casati Milano atelier.

Yes, the 3692.30.31 with its 20mm lug width is perfectly compatible with leather straps of every type: alligator, calf, vegetable-tanned, shell cordovan. The choice depends on the context of use and aesthetic preference. Leather straps crafted with vegetable tanning also offer the advantage of developing natural patina over time, enhancing the appeal of your watch.

An artisanal quality leather strap (alligator, calf, cordovan) mounted on a Speedmaster 3692.30.31 has an average lifespan of 3-5 years with regular wear, depending on frequency of use, climate, and maintenance. Vegetable-tanned straps develop patina and improve aesthetically over time, requiring occasional cleaning with a soft dry cloth. Casati Milano atelier guarantees 18 months on made-to-measure straps and offers reconditioning services to extend the useful life of your artisanal strap.