Jaeger-LeCoultre
Master Grande Tradition 5253420— lug 20mm

The Jaeger-LeCoultre Master Grande Tradition ref. 5253420 has a 20mm lug width. This measurement is obtained by placing a digital caliper or millimeter ruler between the two lugs of the case at the strap attachment point. The taper toward the buckle typically reduces the strap width to 18mm at the opposite end.

For a white gold tourbillon-minute repeater like the ref. 5253420, the most suitable strap is alligator leather with regular grain and glossy or semi-glossy finish. Crocodile enhances the complexity of the dial and the preciousness of the case. Alternatively, a satin box-calf leather offers a more contemporary aesthetic and develops a distinctive patina over time.

The strap is replaced by removing the spring bars that connect the strap to the case lugs. A dedicated spring bar tool or pointed instrument is sufficient. On a white gold case like this one, care should be taken to avoid scratching the surfaces: the operation is ideally performed by a watchmaker or a specialized atelier such as Casati Milano.

Yes, all straps with standard 20mm attachment are technically compatible with the ref. 5253420. It is important to choose straps with polished stainless steel spring bars, or ideally white gold-plated ones for consistency with the case. Milano Straps offers a selection of artisanal 20mm straps compatible with this model, also available as bespoke versions through the Casati Milano atelier.

The lifespan of a leather strap depends on the quality of the tanning, usage, and maintenance. A high-quality alligator strap with hand stitching and a kid leather inner lining can last 3 to 5 years with regular use. To preserve its integrity, it is advisable to avoid prolonged exposure to water and perspiration, rotate between multiple straps, and occasionally apply a conditioner specific to exotic leather. The 18-month warranty offered by Casati Milano covers manufacturing defects.