Strap for Speedmaster Moonphase Chronograph Master Chronometer Blue Side of the Moon

The exact lug width is 21 mm. It is essential to verify this specification before purchasing an aftermarket strap, as 20 mm or 22 mm straps will not fit correctly on the case. To measure, check the internal distance between the two spring bars (the metal cylinders) where the strap passes: it must be exactly 21 mm.

For a black ceramic model, we recommend black alligator or dark brown alligator with medium grain, paired with a steel or titanium deployant clasp. This choice enhances the contrast between the cool ceramic and the organic texture of the leather, creating an aesthetic and functional balance. Valid alternatives are vegetable-tanned calf leather for a more elegant aesthetic, or technical canvas NATO for more dynamic use.

Remove the spring bars using a spring bar tool. Position the tool in the small slot of the spring bar, gently press downward to compress the spring, then slide the bar out of the case. Repeat for the second spring bar. Insert the new strap by aligning it correctly, then reinsert the spring bars until the locking click is felt. Ensure the strap is securely fastened before wearing the watch.

Yes, any strap with a 21 mm lug width is compatible. Always verify the exact dimensions before purchasing. Bespoke artisanal straps, such as those from Casati Milano or available on milanostraps.it, offer superior quality in leather and finishing compared to generic products, ensuring durability and customization.

A quality leather strap (alligator or vegetable-tanned calf) typically lasts 3-5 years of regular use, provided it undergoes periodic maintenance: cleaning with a damp cloth, protection from harsh liquids, and alternation with other straps to promote natural drying. Artisanal straps with an 18-month warranty offer protection against manufacturing defects. Replacement is simple and cost-effective compared to the overall lifespan of this chronograph.