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

The lug width of the Constellation 123.20.35.20.63.001 is 20mm. This constructive specification is calibrated to enhance the proportions of the 35mm two-tone case. To verify your lug width, use a strap remover tool to extract the current strap, then measure with a digital caliper the distance between the two lugs: it must be exactly 20mm. A lug even just 1mm different would create unwanted gaps or improper fit.

Dark brown alligator and vegetable-tanned calf are the ideal materials. Alligator offers absolute formality thanks to its fine and consistent grain that does not compete with the two-tone case; calf represents maximum versatility because it ages magnificently, developing a patina that amplifies character over time. Shell cordovan is the pinnacle for durability and aesthetics, thanks to its exceptionally dense structure and natural polish that dialogues perfectly with aged rose gold.

Remove the strap using a strap remover tool (extractor pins): position the thin tip between the case and the strap, under the lug, and push gently until the spring bar comes out. Flip the watch over and repeat on the other side. Insert the new strap by aligning one lug first, insert the spring bar, then align the other lug and complete the insertion. Verify that the spring bar is flush with the case on both sides. If the strap has a steel deployant, ensure the bracelet is adjusted to your wrist size before wearing.

Yes, any strap with a 20mm lug width is compatible, provided the actual width is precise. However, to enhance the specific proportions of this 35mm two-tone case, we recommend straps made with premium leathers: alligator, vegetable-tanned calf, shell cordovan or dense fabric NATO. Avoid glossy varnished leather straps, which would create an aesthetic contrast unsuitable to the formal-elegant character of the Constellation.

An alligator strap, with proper care and not constantly exposed to rain or intense perspiration, lasts 5-8 years. Vegetable-tanned calf, being more porous, requires slightly more maintenance but can exceed 10 years if protected from excessive moisture. Shell cordovan is the most long-lasting material, reaching even 15-20 years, thanks to its exceptionally dense structure that makes it virtually waterproof. We recommend air-drying the strap after exposure to humidity and applying a vegetable leather conditioner at least twice a year.