Strap for Constellation Co‑Axial Master Chronometer 27 Small Seconds Stainless Steel / Red Gold / MOP

The lug width is 17mm, a standard in the luxury women's segment. Measure the internal distance between the case lugs with a digital caliper to verify compatibility with aftermarket straps. 16mm or 18mm straps will not fit correctly.

Alligator in natural shades (white, beige, pearl grey) harmonizes perfectly with the mother-of-pearl dial. For durability, vegetable-tanned calf leather in burgundy or dark brown develops a patina over time. For versatility, high-quality vulcanized rubber straps maintain elegance even in humid environments.

Remove the watch from your wrist and position it with the case facing upward. Using a spring bar tool, apply pressure from below to compress the internal spring of the lug and extract the end from the attachment hole. Repeat on the opposite side. Insert the new strap by aligning the internal diameter of the lug with the case holes and press until you hear a safety click.

All 17mm straps are compatible. MilanoStraps offers 17mm straps online in alligator, vegetable-tanned calf, shell cordovan and rubber, customizable in size, initials and thread color. The Casati Milano atelier also creates bespoke straps with personal leather selection and an 18-month warranty.

A premium quality alligator strap lasts 3-5 years with regular maintenance (periodic cleaning and conditioning). Vegetable-tanned calf leather lasts 2-3 years before showing visible wear. Factors such as ambient humidity, frequency of use and sun exposure significantly affect longevity. The quality of construction and stitching has a greater impact on durability than the leather itself.