Strap for Speedmaster Professional Moonwatch Stainless Steel / Yellow Gold / Black / Tokyo Olympics

The strap width of the Speedmaster Professional 522.20.42.30.01.001 measures exactly 20 millimetres. This dimension is specific to the protruding lugs of 5mm characteristic of this model. The measurement must be taken perpendicular to the case, from inner lug to inner lug, excluding the outer edges of the lug width to avoid errors that would compromise strap fit.

For the two-tone version in 18k yellow gold and steel, a black alligator with vertical grain is the ideal choice: it emphasises the matte dial and allows the yellow gold to emerge as the dominant warm element. Alternatively, dark brown or burgundy vegetable-tanned calf leather introduces natural patina over time, enriching the visual appearance of the case. Shell cordovan, if available, offers maximum contrast thanks to its polished surface that dialogues differently with matte dials.

Changing the strap requires removal of the spring bars that connect the lug width to the case. Use a dedicated tool (spring bar tool) to gently compress the pin on one side, then remove the old strap. Insert the new strap by aligning the attachments to the lug width, then push the pin into the second hole until you feel it click. Ensure the pin is fully inserted on both sides before wearing the watch. If you choose a Casati Milano strap, our atelier can assist with replacement by appointment.

Yes, any strap with 20mm lug width is compatible with the Speedmaster Moonwatch 522.20.42.30.01.001. Online you will find straps ready for shipment in materials such as alligator, calf, shell cordovan, NATO fabric and sports rubber. Casati Milano produces custom straps for this model, with the possibility of personalising leathers, embroidered initials and stitching choice, with an 18-month warranty.

Durability depends on the material and use. A quality artisanal alligator or vegetable-tanned calf strap lasts 5-8 years with regular use, developing prized natural patina over time. Shell cordovan can last 10+ years thanks to superior fibre density. The same strap can be regenerated through professional restoration that restores colour and flexibility. Casati Milano straps benefit from 18 months of warranty and can be revitalised through tailoring work by appointment at the atelier.