Strap for Constellation Co-Axial 27 Brushed Yellow Gold / MOP Supernova

The lug width is 20mm. This measurement indicates the distance between the two lateral lugs of the case where the strap is attached. It is essential to choose a strap specifically designed for this dimension to ensure perfect compatibility and correct fit on the wrist without gaps or excessive pressure on the lugs.

For the 123.50.27.20.55.002 in yellow gold, alligator is the natural choice: its fine and regular texture enhances the warmth of gold without competing visually. Cognac or dark brown tones amplify the vintage effect. Vegetable-tanned calf leather offers a sophisticated alternative with a patina that evolves over time. Shell cordovan, though less common, creates an extraordinary effect thanks to the natural lustre of equine leather.

Equip yourself with a specific spring bar tool. Position the watch on a stable surface, insert the tool tip into the lateral lug hole, gently lift to free the spring bar. Repeat for both sides. To install the new strap, align the holes with the lugs, press the spring bar until you hear the closure click. Verify that the strap is securely attached before wearing the watch.

Yes, quality aftermarket straps are fully compatible with the 123.50.27.20.55.002, provided they strictly respect the 20mm lug width. Handcrafted straps made in fine leather (alligator, shell cordovan, vegetable-tanned calf) often offer superior finishes and customizations compared to standard straps. Ensure that the supplier clearly specifies compatibility with this reference.

Durability depends on the material and usage. Quality alligator guarantees 3-4 years of regular use without visible degradation, then develops a sought-after patina. Napped calf lasts 2-3 years before showing wear; vegetable-tanned calf reaches 4-5 years thanks to greater moisture resistance. Shell cordovan is the most durable (5-7 years), while NATO canvas can last indefinitely. Maintenance (avoiding prolonged immersion, drying the strap after rain) significantly extends useful life.