Strap for Speedmaster Moonwatch Co-Axial Grey Side of the Moon / Porsche Club of America

The lug width of the Speedmaster (Non-Moonwatch) 311.92.44.51.99.001 is exactly 21mm. This is a standard measurement for this model and allows compatibility with artisanal 21mm straps. To verify the measurement, position a millimeter ruler between the two lugs, measuring from the center of one to the center of the other.

The best strap depends on your use and personal preferences. For an elegant and sophisticated pairing, we recommend vegetable-tanned black alligator, which develops a patina over time. For daily wear and versatility, Italian calf offers immediate comfort. For dynamic contexts, vulcanized rubber ensures water resistance. At Casati Milano you can personally select the leather and customize your strap to order.

Changing the strap requires extraction of the lug pins using a specific tool (spring bar tool) or by visiting a watchmaker. The pins must be gently pushed inward to release the fastening screws. Once the lug is free, the new strap can be inserted. If you prefer not to perform the operation yourself, the Casati Milano atelier offers mounting service with personalized consultation.

All straps with 21mm lug width are compatible with the Speedmaster PCA. On the market are available straps in leather (alligator, calf, cordovan, crocodile), rubber, NATO fabric and suede. MilanoStraps offers a specialized collection of artisanal 21mm straps, customizable in sizes, colors and stitching thread, with 18-month warranty.

The lifespan of a leather strap depends on intensive use and environmental conditions. A high-quality alligator or calf strap, vegetable-tanned, lasts on average 3-5 years with daily wear. Shell cordovan, more resistant, can exceed 5-7 years. Regular maintenance (avoiding prolonged moisture, applying specific balms) significantly extends the lifespan. Casati Milano straps are guaranteed 18 months against material defects.