Strap for Constellation Co-Axial 38 Yellow Gold / Silver

The lug width of the Constellation 123.50.38.21.02.002 is exactly 20mm, measured internally from lug to lug. This width is specific to the model and must be respected rigorously to ensure compatibility, correct tension, and load distribution on the yellow gold case. Any aftermarket strap must feature lugs calibrated to 20mm with tolerances of ±0.2mm.

Vegetable-tanned alligator represents the most natural choice for this model. The texture of the scales dialogues elegantly with the mirror-polished finishes of the case, while the material reflects the nobility of yellow gold. Recommended colors: natural dark brown, burgundy, or formal black. Shell cordovan is an excellent alternative for those desiring structural compactness and evolved luster. Milano Straps offers selections of Hermès alligator and Italian vegetable-tanned calf leather specifically matched to this model.

Changing the strap requires the use of specific tools: a spring bar removal tool and a stable base to prevent scratches on the yellow gold case. Gently insert the removal tool under the spring bar pin, applying light pressure to compress the internal spring, then extract the pin by leveraging outward. Repeat on both lugs. To install the new strap, align the lugs on the spring bars and snap the pins down with a fluid movement. If you lack experience, Casati Milano provides strap-changing service with personalized aesthetic consultation.

All straps with a 20mm lug width are compatible with the Constellation 123.50.38.21.02.002. On Milano Straps you will find a curated selection of models in alligator, shell cordovan, vegetable-tanned calf leather, and FKM rubber, all calibrated to 20mm and tested on this specific model. Compatibility concerns not only geometric width but also aesthetic balance between the case diameter (38mm) and strap thickness.

A quality alligator strap (Hermès, Schedoni, Ebel) lasts on average 4-6 years with daily use, considering natural wear on the lugs and buckle. A vegetable-tanned calf leather strap evolves in color, developing a fascinating patina, but maintains structural integrity for 3-5 years. Durability depends on intensity of use, care in cleaning, and exposure to moisture. Milano Straps offers an 18-month warranty on all made-to-measure straps and provides reconditioning services to extend the life of the original strap.