Jaeger-LeCoultre
Duomètre Q604848J— lug 21mm

The Jaeger-LeCoultre Duomètre Q604848J features a lug width of 21.00 mm. This specific measurement is exclusive to this model and requires straps built with Spring Bar attachments precisely sized at 21 mm. Verification to the nearest tenth of a millimetre is essential for perfect casing fitment.

For the Duomètre Q604848J, we recommend a high-grade alligator with fine grain in dark tones (black, graphite grey, navy blue), or vegetable-tanned calf leather for those who prefer patina development over time. Shell cordovan in black or burgundy offers exceptional durability and intrinsic lustre. Selection should reflect intended use and dress code context.

Remove the two Spring Bars—the spring-loaded pins securing the strap to the lugs—using a dedicated Spring Bar Tool. Once removed from the old strap, insert them into the new strap and reinstall into the casing lugs. For a Jaeger-LeCoultre of this calibre, we recommend enlisting an experienced watchmaker if unfamiliar with the procedure.

Yes, provided the strap features Spring Bar attachments precisely sized at 21 mm for this model. An artisanal leather strap of quality—alligator, cordovan, or calf—represents an excellent choice to enhance the watch's sophistication. Ensure materials and finishing are impeccable, matching the casing's quality standards.

Leather strap lifespan depends on material quality, frequency of use, and care. Premium alligator or shell cordovan can last 5–8 years with regular use and proper maintenance (water protection, periodic cleaning, conditioning). Vegetable-tanned calf develops characteristic patina whilst maintaining similar longevity. Casati Milano provides an 18-month warranty against manufacturing defects.