Strap for Constellation Co-Axial 38 Stainless Steel / Yellow Gold / Grey

The lug width of the Constellation 123.20.38.21.06.001 measures exactly 20mm. This measurement corresponds to the distance between the attachment holes on the case. It is essential to verify this dimension before purchasing an aftermarket strap, as an incompatible lug width compromises both the aesthetics and structural integrity of the case.

For the two-tone Constellation in stainless steel and yellow gold, we recommend vegetable-tanned alligator in light brown tones (cognac, cream) or dark grey lined calf. Alligator develops a patina over time that synchronizes with the aging of the gold, creating visual cohesion. Lined calf amplifies the constructive modernity of the case. For evening occasions, burgundy shell cordovan transforms the model into a dress watch.

The strap is attached to the case via spring bars. To change the strap: use a dedicated tool or small screwdriver to gently lift the spring and slide the bar out of the attachment holes. Remove the old strap and insert the new one, ensuring the spring bars lock correctly into the 20mm holes. If you prefer professional service, Casati Milano can handle the strap change with personalized consultation.

Compatible 20mm straps include alligator, box calf, lined calf, shell cordovan, FKM rubber, ballistic NATO, and quality nylon fabrics. Milano Straps offers a curated collection of 20mm straps customizable for the Constellation. Each model is tested to guarantee structural and aesthetic compatibility with the two-tone case. Adapters are not recommended as they compromise structural integrity.

A premium leather strap (alligator, calf, shell cordovan) lasts an average of 3-5 years with daily use, depending on maintenance, climate, and sun exposure. Vegetable-tanned alligator tends to age more gracefully, developing patina without fragmenting. FKM rubber straps last 5-7 years. Casati Milano guarantees 18 months and offers regeneration services to extend the life of your original strap.