Strap for De Ville Trésor Master Co-Axial White Gold / Silver

The lug width of the Trésor 432.53.40.21.02.004 is 20 millimetres. This measurement is the constructive distance between the lugs of the case and is decisive for compatibility with any strap. It is measured precisely using a digital caliper applied perpendicularly to the lugs, with no strap mounted. Even a 1 millimetre error would result in detachment or tension that compromises aesthetics and functionality.

Vegetable-tanned alligator is the classic luxury solution: the regular grain and compact fibrous structure support the weight of white gold, while vegetable tanning develops an authentic patina over time. For daily wear, calf leather offers softness and comfort; for a more dynamic style, dark blue or grey tortoiseshell NATO straps provide versatility. Medical-grade rubber remains the technical choice for humid or sports environments, without compromising elegance.

The strap change is performed by removing the spring bars that secure the strap to the lugs. Using a dedicated tool (Spring Bar Tool), gentle pressure is applied inward to release the pin from its housing. The old strap is removed and the new one inserted, aligning the spring bar with the lug and allowing it to click into position. The operation requires care to avoid scratching the white gold case; Casati Milano offers this service in-atelier.

Yes, any strap with a 20 millimetre lug width is mechanically compatible. The variable is the quality of construction and aesthetic pairing. MilanoStraps straps are made from premium leather (alligator, calf, shell cordovan) with hand stitching and edge painting finish, ensuring a visual result consistent with the luxury of the Trésor. An 18-month warranty covers constructive integrity.

A quality leather strap, subjected to moderate daily use (worn 4-5 days weekly), maintains structural and aesthetic integrity for 2-4 years. Vegetable-tanned leather, if regularly maintained (dried after moisture exposure, protected from direct sunlight), can extend lifespan to 5-6 years with authentic patina. Medical-grade rubber lasts 3-5 years before signs of hardening appear. The keepers and buckle are stress points: careful maintenance significantly extends the strap's useful life.