Strap for Constellation Master Chronometer 39 Yellow Gold / Silver / Bracelet

The Omega Constellation 131.50.39.20.02.002 has a lug width of 24 millimeters. This dimension is critical: a strap sized at 22 mm or 26 mm would cause compatibility issues and stress on the spring bar attachment points. Always verify the 24 mm value before purchasing a replacement strap.

For this yellow gold model, we recommend a high-end alligator strap crafted with natural tanning. The fine texture of alligator complements gold beautifully and develops a patina that improves over time. Alternatively, dark brown shell cordovan or vegetable-tanned calf offer authentic elegance while maintaining aesthetic compatibility with the Co-Axial movement.

To change the strap, you will need a spring bar tool. Remove the old strap, extract the lateral spring bars, insert them into the new strap ensuring they are positioned correctly, then secure the strap to the case. If you are unsure about the procedure, the Casati Milano atelier offers professional installation service by appointment.

Any strap with a lug width of 24 mm is compatible with the 131.50.39.20.02.002. Milanostraps offers a selection of customizable 24mm straps in leather, color, and finishes, with your choice of stitching thread. Ensure that the strap is exactly 24 mm to avoid play or anomalous stress.

A quality leather strap, such as those offered by Casati Milano, has an average lifespan of 3-5 years with daily use, depending on exposure to sunlight, heat, and humidity. Vegetable-tanned and alligator leather age better than industrial leathers, developing patina and character. Casati Milano offers an 18-month warranty on all custom-made straps.