Jaeger-LeCoultre
Reverso 3902420— lug 20mm
Jaeger-LeCoultre Reverso 3902420: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
Jaeger-LeCoultre 3902420The essential strap measurement.
Browse 20mm straps →3902420
Jaeger-LeCoultre caliber 854A/2 Hours, Minutes, Additional 12 Hour Hand (adjustable), Day / Night Indication
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Reverso
FAQ
What is the lug width of the Jaeger-LeCoultre Reverso 3902420?
The Jaeger-LeCoultre Reverso 3902420 is fitted with a 20mm lug width. This measurement refers to the internal distance between the two integrated spring bars in the rose gold case. To verify it, position a caliper or millimeter ruler in direct contact with the case, measuring the space between the stepped lugs characteristic of the Reverso's Art Deco design.
What is the best strap for the Jaeger-LeCoultre Reverso 3902420?
For the Reverso 3902420 in rose gold 25.5mm, a smooth alligator strap is the most coherent choice with the watch's formal aesthetic: the tight grain of the scales complements the stepped lines of the lugs. The most successful colors are burgundy, midnight blue, and anthracite slate. Box-calf leather in warm tones—cognac or tobacco—is the most versatile alternative, capable of developing a personal patina over time that harmonizes with the warm temperature of rose gold.
How do you change the strap on the Jaeger-LeCoultre Reverso 3902420?
The Reverso 3902420 lugs accommodate standard 20mm spring bars. Strap replacement requires a dedicated spring bar tool: insert the tip into the lug slot, compress the spring bar, and slide out the strap. The operation requires care because the lugs integrated into the rose gold case are delicate. It is advisable to consult a watchmaker or the Casati Milano atelier to avoid scratches on the case.
Are there aftermarket straps compatible with the Jaeger-LeCoultre Reverso 3902420?
Yes, all straps with a standard 20mm attachment are technically compatible with the Reverso 3902420. However, it is essential that the strap ends be cut square—not pointed—to respect the rectangular geometry of the case. The 20mm artisanal straps available on milanostraps.it are crafted with ends suited to the Reverso's shape, ensuring precise visual alignment with the rose gold case.
How long does a leather strap last on a Jaeger-LeCoultre Reverso 3902420?
The lifespan of a leather strap depends on material quality and conditions of use. A high-quality alligator strap, used with care and alternated with other straps, can last 3 to 5 years while maintaining structural and aesthetic integrity. Box-calf leather has a similar lifespan and develops a patina that improves its appearance over time. Casati Milano straps are covered by an 18-month warranty against manufacturing defects.
The next step
The right strap isn’t chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →By appointment only · Milan
The atelier's website: casatimilano.com