Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Yellow Gold / Aventurine

The lug width of reference 131.50.29.20.53.002 is 18 millimeters. This specific width is determined by the geometry of the 29mm case and represents the available space for strap insertion between the case lugs.

For a Constellation in 18-karat yellow gold, we recommend natural alligator with vegetable tanning or smooth calf leather of medium thickness (1.4-1.6mm). Alligator develops a patina that harmonizes with the aging of gold, while calf offers superior aesthetic versatility in formal settings.

Gently remove the metal spring bars from the lugs using a rounded end (spring bar tool tip). Insert the new strap into the spring bars, ensuring it is positioned perfectly centered. For gold cases, use slow movements to avoid scratches on the inner surface of the lugs.

Yes. You will find 18mm straps online from specialized suppliers. Ensure the width is precisely 18mm and the thickness does not exceed 2mm to avoid excessive pressure on the spring bars. Always verify mounting photos before purchase.

A quality leather strap (alligator or natural calf) typically lasts 3-5 years of daily use, depending on exposure to sweat, humidity, and cleaning frequency. Regular maintenance with protective cream extends durability up to 7 years. Rubber straps last 4-6 years with minimal maintenance.