Jaeger-LeCoultre
Master 16634V2 (aka: Q16634V2)— lug 20mm

The Jaeger-LeCoultre Master Grande Tradition reference 16634V2 (Q16634V2) has a 20mm lug width. This measurement is taken between the two lugs of the case with a caliper and is compatible with the entire range of 20mm aftermarket straps available on milanostraps.it.

For a tourbillon in white gold such as the 16634V2, a mississippiensis alligator strap—belly or hornback—is the most coherent choice both aesthetically and technically. The natural texture of the scales integrates with the complexity of the dial, while the patina developed over time personalizes the piece in an irreplaceable way. Alternatively, polished box-calf leather offers a more refined solution for everyday formal contexts.

Changing the strap on the Master 16634V2 requires a fine-tipped spring bar tool to remove the attachment bars between the lugs. The operation is straightforward on a soft surface that protects the white gold case from scratches. It is recommended to have the replacement performed by a watchmaker or to proceed with utmost care, given the value of the piece and the delicacy of the 18k gold surfaces.

Yes. The standard 20mm lug width of the 16634V2 is compatible with all quality aftermarket straps produced in this size. Milanostraps.it offers a selection of 20mm straps in alligator, calf, NATO, and rubber compatible with this reference. For a custom solution with personally selected leather, the Casati Milano atelier produces bespoke straps by appointment.

The durability of a leather strap depends on the material, frequency of use, and exposure conditions. Quality alligator, with regular but not daily use and proper maintenance (kept away from water and prolonged sweat exposure), maintains structural and aesthetic integrity for 3-5 years. Box-calf leather has similar longevity but is more sensitive to humidity. Casati Milano straps are covered by an 18-month warranty against manufacturing defects.