Strap for Constellation Co-Axial 38 Red Gold / Diamond / Silver

The lug width of the 123.55.38.21.52.005 model is 18mm. This dimension represents the distance between the two lugs of the case and determines the compatibility of all aftermarket straps. To verify it, position a digital caliper perpendicular to the case, measuring the space between the lugs: it must be exactly 18mm to ensure a correct fit.

For a Constellation in Red Gold, we recommend alligator or vegetable-tanned calf leather. Alligator enhances the nobility of the precious metal, with a natural texture and a patina that improves over time. Vegetable-tanned calf leather offers daily versatility, superior durability, and develops a unique patina over the months. For sports use, a rubber or NATO strap protects the Red Gold from moisture and chlorine while maintaining elegance.

To change the strap, position the watch on a soft surface. Locate the lateral lugs of the case (visible on the sides). Using a spring bar tool—a metal instrument shaped like tweezers—gently press the hook beneath the lug, creating a space to extract the lug pin itself. Repeat on the other side. Once both pins are removed, the old strap will come off. Reinsert the pins into the new strap ensuring they are well positioned and aligned. Never force: excessive pressure risks damaging the case or pins.

Yes, you can use a compatible aftermarket strap, provided it has a lug width of 18mm. Many specialized brands—including MilanoStraps—produce aftermarket straps crafted from premium leathers (alligator, vegetable-tanned calf, shell cordovan) that fit your Constellation perfectly. Aftermarket straps offer the possibility of customization (color, stitching thread, initials), making them a popular choice among collectors who wish to alternate styles without compromising quality.

Durability depends on the material and usage. A well-maintained vegetable-tanned calf leather strap typically lasts 3-5 years with daily wear, while alligator—thanks to the denser fiber structure—can last 5-8 years. Shell cordovan, being exceptionally resistant, easily exceeds 10 years. Longevity increases significantly if you rotate wearing the watch (not daily) and if you expose the strap to ideal conditions (dry, protected from direct sunlight). Periodic cleaning with mild soap and air drying substantially extends the strap's life.