Strap for Constellation Co-Axial 35 Stainless Steel / Red Gold / Black

The lug width of the Constellation 123.20.35.20.01.001 is 20mm. This specification is critical for selecting a compatible strap without forcing. Measuring correctly means positioning a caliper between the two vertical lugs of the case, perpendicularly, with the bracelet removed.

For the Constellation 123.20.35.20.01.001, alligator (bourbon brown or black) is the absolute formal choice, thanks to the elegant contrast with the steel case. Shell cordovan is ideal for those seeking a hard, durable leather that ages gracefully and nobly. For daily wear, fine-grained calf in cognac color offers comfort and natural patina. Black Cordura rubber is perfect for those who alternate between city and light sports.

The strap is changed by removing the original bracelet using the spring bars. Position the watch with the lug side facing upward, gently press toward the center of the case with a flat-tipped tool (spring bar tool), and slide the bar out of its housing. Insert the bar into the new strap by repeating the procedure in reverse. For Milano Straps customers, strap installation service is available at the atelier.

Yes. Any strap with 20mm spring bar attachments is compatible with the Constellation 123.20.35.20.01.001. Milano Straps offers a collection dedicated to 20mm straps, from classic to contemporary designs, in natural leather, shell cordovan, alligator, and fabric. All are customizable in color, size, and stitching details.

A quality leather strap (alligator, shell cordovan, certified calf) worn daily lasts on average 3–5 years before showing visible signs of aging: minor creasing at folds, material thinning at stress points. With care (avoiding getting wet, prolonged direct sun exposure, storage in a cool environment), the useful life extends. Milano Straps straps include an 18-month warranty against manufacturing defects.