Jaeger-LeCoultre
Master 16634E0 (aka: Q16634E0)— lug 20mm

The lug width of the Jaeger-LeCoultre Master 16634E0 (also known as Q16634E0) is exactly 20 mm. This is the official technical specification for this reference and determines the compatible strap size without adapters. To verify on your own watch, measure with calipers the internal distance between the two lugs at the attachment point, not the case diameter.

For a white gold case with tourbillon, mississippiensis alligator in black or nile crocodile in midnight blue represent equally matched pairings to the craftsmanship of the piece. Smooth box-calf leather in black or tobacco brown is an elegant alternative with a patina that improves over time. Casati Milano creates custom bespoke straps for this reference, with ends adapted to the profile of the original lugs.

The strap on the Jaeger-LeCoultre Master 16634E0 is removed using a thin-blade or fork-style strap removal tool, working on the spring bars that connect the strap to the case lugs. It is recommended to work on a soft surface to protect the white gold case from scratches. For models with integrated attachment or screw-down lugs, it is preferable to consult a watchmaker or specialized atelier such as Casati Milano.

Yes, there are high-quality aftermarket straps compatible with the Jaeger-LeCoultre Master 16634E0, provided they respect the 20 mm lug width and the end curvature profile. Milano Straps offers a selection of 20mm handcrafted straps, produced in alligator, calf leather and other materials, compatible with this reference. The bespoke craftsmanship of Casati Milano also allows every geometric detail to be adapted to the specific characteristics of the case.

The lifespan of a leather strap depends on the material, frequency of use, and care. High-quality alligator, kept away from water and excessive perspiration and periodically treated with specific creams, can last from 3 to 5 years while maintaining a flawless appearance. Calf leather tends to develop a patina appreciated by connoisseurs but requires more frequent replacement in case of intensive use. Casati Milano offers an 18-month warranty on manufacturing defects for all straps created in the atelier.