Strap for Speedmaster Moonphase Chronograph Master Chronometer Stainless Steel / Yellow Gold / Silver

The lug width is 21mm. This measurement refers to the distance between the case lugs where the strap is attached. Verify the measurement with a digital caliper positioned perpendicular to the case, ensuring it is consistent on both sides of the lug.

Cognac alligator represents the formal choice: the regular grain and intrinsic luminosity of the leather pair perfectly with yellow gold. For patina longevity and visual contrast, vegetable-tanned dark brown calf ages naturally into deep tones. Structured rubber remains the pragmatic solution for everyday wear.

The strap is removed via the removable lugs on the case. Obtain a caseback opening tool or contact a watchmaker to avoid damaging the ceramic. Once opened, spring-load the lug inward and slide the strap outward. Installation of the new 21mm strap proceeds in reverse order.

All straps with 21mm lug width are compatible. Milano Straps offers straps in alligator, calf, shell cordovan, NATO, and FKM rubber, tested on this case to ensure perfect fit with the case shoulders and lug design. Customizable in length, initials, and thread color.

An artisanal quality leather strap lasts an average of 3-5 years with daily wear, depending on humidity and maintenance. Shell cordovan, being harder, lasts longer. Shell cordovan and vegetable-tanned calf develop patina over time, improving aesthetically. Casati Milano offers an 18-month warranty on all straps and maintenance revisions by appointment.