Jaeger-LeCoultre
Master Ultra Thin 1343501— lug 20mm

The Jaeger-LeCoultre Master Ultra Thin 1343501 is fitted with a 20mm lug width. To verify the measurement on your own watch, it is advisable to measure with calipers the internal distance between the two lugs in the area closest to the case, avoiding inclusion of the bezel in the measurement.

For a dress watch in white gold such as the 1343501, the ideal strap is in Louisiana or Mississippiensis alligator, preferably in colors such as navy blue, polished black, or burgundy. Box-calf leather represents a more understated and contemporary alternative. Both materials respect the formal vocation of the watch and age with the same elegance as the case.

The strap is replaced using a dedicated springbar tool with a fine tip, necessary to push the spring bars present in the lugs. Given the delicacy of the white gold case, it is recommended to work on a soft cloth and with maximum care to avoid scratches. In case of doubt, it is preferable to entrust the work to a watchmaker or the Casati Milano atelier.

Yes. All straps with 20mm attachment and standard springbars are technically compatible with the Master Ultra Thin 1343501. Milano Straps offers a selection of artisanal 20mm straps made specifically for high-end dress watches, with thin profiles suited to the lug geometry of the white gold on this reference.

A quality leather strap — alligator or vegetable-tanned calf — with moderate daily use has an average lifespan of 18-36 months before the natural patina requires replacement. Longevity depends on exposure to humidity, perspiration, and direct sunlight. Casati Milano straps are covered by an 18-month warranty against manufacturing defects.