Strap for Speedmaster Professional Moonwatch Apollo XI 1969

The lug width of the BA 145.022 XI is 20mm, the historic standard of the Moonwatch family. This width corresponds to the distance between the two horizontal pins that support the strap. It is essential to verify that any aftermarket strap is constructed precisely for 20mm, as even minimal variations (19mm or 21mm) would cause excessive play or friction on the lugs and buckle.

Alligator in dark brown or black tonality is the traditional choice, as the smooth texture enhances the case geometry and the natural grain complements the elegance. Shell Cordovan, however, offers the most sophisticated solution: it resists wear over time, develops a fascinating patina, and maintains a natural lustre that pairs perfectly with gold. Vegetable-tanned calfskin represents a more informal but equally elegant alternative.

The BA 145.022 XI features standard 20mm spring bars or through-lugs. To replace the strap: secure the watch on a stable surface, identify the small circular hole on one of the lugs, insert a spring bar tool or fine needle into the hole to compress the internal pin, then remove the upper lug. Repeat the operation on the opposite side. When reinstalling, ensure the pin clicks completely into the new lugs, verifying that the strap has no play.

Any strap constructed precisely for the 20mm lug width is compatible, provided the spring bars are standard (1.8mm diameter). Avoid generic straps labelled vaguely as 'Speedmaster compatible': always verify that the 20mm width is confirmed. MilanoStraps offers a curated collection of 20mm straps for the BA 145.022 XI in alligator, shell cordovan, calfskin and rubber, all customizable.

The lifespan of a leather strap depends on the material and usage. Alligator and vegetable-tanned calfskin require replacement every 3-4 years with daily wear. Shell Cordovan, thanks to its density and resistance, lasts 5-7 years or more, especially if subjected to periodic maintenance (gentle cleaning, annual conditioning). Rubber and silicone offer superior durability (8-10 years) but mature less aesthetically over time. Proper storage and rotation between multiple straps significantly extends the life of each piece.