Jaeger-LeCoultre
Reverso Q39334B2— lug 20mm

The lug width of the Jaeger-LeCoultre Reverso Q39334B2 is 20 mm. This dimension is specifically engineered for the rectangular case geometry and should not be confused with similar models: an incorrect lug width compromises both aesthetics and mechanical integrity. Always verify with a digital calliper the distance between the two lugs.

Genuine alligator represents the canonical choice for formal elegance, thanks to its natural grain and sophisticated texture that perfectly complements white gold. High-quality vegetable-tanned calf leather develops a patina that evolves over time. For a sportier character, FKM rubber in pearl grey or black retains luxury without sacrificing practicality. Avoid inexpensive synthetic leather straps: the Reverso deserves craftsmanship.

The strap is changed via spring bars positioned at the case extremities. Obtain a specific bayonet spring bar tool or consult a certified watchmaker. The mechanism is sensitive: never force it. If your watch is still under warranty, the change should be performed by an authorised Jaeger-LeCoultre service centre to preserve coverage.

Yes, provided it respects the 20 mm lug width. Numerous craftsmen and brands produce quality-equivalent straps for this width. Choose suppliers specialised in luxury watchmaking who understand the mechanical and aesthetic requirements of a Reverso: the strap is not a mere accessory, but an integral part of the watch's visual identity.

A quality leather strap, treated with vegetable tanning or full-grain leather, typically lasts 3–5 years with daily wear, if subjected to regular maintenance. Humidity, perspiration and UV rays accelerate ageing. An alligator or shell cordovan strap tends towards superior longevity (5–7 years) thanks to leather density. Casati Milano guarantees 18 months for manufacturing defects and offers periodic reconditioning service.