Strap for L.U.C Time GMT One Black

The lug width of the Chopard L.U.C 68579-3004 is 18 millimetres. This measurement is specific to this model and ensures proportional balance with the 42mm case diameter. Correct measurement is executed internally between the two lugs, using a digital calliper or millimetre ruler with the dial facing downwards.

For the Chopard L.U.C 68579-3004, alligator leather with vegetable tanning represents the historical choice and is most coherent with the Swiss chronometer's identity. Shell cordovan offers superior durability for daily wear, whilst vegetable-tanned calf provides initial comfort and simpler maintenance. The choice depends on intended use and personal preferences regarding leather ageing.

To change the strap, use a spring bar tool. Position the watch dial-side down, insert the bifurcated blade under the lug to compress the internal spring, and slide the pin laterally. Repeat on both sides. Ensure the new strap has a compatible 18mm lug width before inserting the pins. Handle the chronometer with appropriate care during this operation.

Yes, aftermarket straps are compatible provided they feature certified 18mm lug width and are manufactured to quality standards consistent with the timepiece's prestige. Alligator, cordovan, calf, and technical material straps are all compatible. Always verify measurements with precision before purchase to avoid mounting incompatibilities.

Durability depends on material and usage patterns. Vegetable-tanned alligator lasts 5–8 years with moderate daily wear; shell cordovan can reach 10–12 years due to the natural density of horse leather; calf has an average lifespan of 4–6 years. Conscious ageing of the leather is part of the 68579-3004's character; regular maintenance and proper storage significantly extend strap longevity.