Strap for Constellation Co-Axial 31 Red Gold / MOP

The lug width of model 123.50.31.20.05.001 is 20 millimeters. This is the width of the space between the spring bars where the strap is inserted. It is essential to measure this space correctly before ordering a compatible strap to avoid sizing errors.

For a Constellation in 18-karat rose gold like the 123.50.31.20.05.001, alligator is the most elegant choice: the regular grain and natural luster pair perfectly with the warmth of rose gold. Vegetable-tanned calf leather is also excellent, as it develops a natural patina over time. For those wanting versatility, shell cordovan offers superior durability and color depth compared to calf.

The strap is changed by removing the spring bars (the pins that pass through the lugs) with a specific tool (spring bar tool). Position the watch on a soft surface, gently compress the pin to release the internal spring, extract the pin from the hole and repeat on the other side. Then insert the bars into the new strap and secure the pins in the lug spaces. If you are unsure, trust a professional.

Yes, any strap with a 20 millimeter lug width is compatible with the 123.50.31.20.05.001. Custom artisanal straps from Milano Straps are made specifically for this measurement and offer superior quality compared to generic straps, with fine leathers and complete customization.

A quality leather strap, made with vegetable tanning or genuine alligator, lasts an average of 3-5 years with daily use, depending on humidity, sun exposure and care. Milano Straps leather straps made from fine hides come with an 18-month guarantee and maintain aesthetic legibility even after years, developing a patina that increases the character of the piece.