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Jaeger-LeCoultre · Reverso

Strap for Reverso Tribute Monoface Stainless Steel / Green

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm
20 mm strapsAll Jaeger-LeCoultre
Lug width20 mm
Case diameter27 mm
ReferenceQ397843J (aka: 397843J)
FamilyReverso
MovementJaeger-LeCoultre caliber 822/2 hours, minutes, small seconds
Year2021
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

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Straps for the Reverso Q397843J (aka: 397843J)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Reverso Q397843J (aka: 397843J), seen from the bench

The Jaeger-LeCoultre Reverso Q397843J features a reversible stainless steel case with a 27.40 mm diameter and a 20 mm lug width. Powered by the JLC 822/2 manual-wind movement, this model combines classical design with functional engineering, maintaining the original 1931 concept of protecting the dial through case rotation. The watch exemplifies French watchmaking tradition with essential complications of hours, minutes, and small seconds.

Frequently asked questions

What is the lug width of the Jaeger-LeCoultre Reverso Q397843J?

The lug width of the Jaeger-LeCoultre Reverso Q397843J is 20 mm. This measurement is essential for strap compatibility and must be verified precisely before purchasing a replacement strap. We recommend contacting Casati Milano or a specialised strap atelier for accurate measurement.

Which strap is best suited for the Reverso Q397843J stainless steel?

For a stainless steel Reverso Q397843J, we recommend an alligator strap in black or cognac brown for maximum elegance. Alternatively, high-quality shell cordovan develops a refined patina over time. A vegetable-tanned calf leather strap is an excellent choice if you desire leather that evolves visually with wear. FKM rubber straps are appropriate for sporting or casual contexts.

How do I change the strap on a Jaeger-LeCoultre Reverso?

The Reverso strap is changed by carefully removing the lugs from their seats on the case. Unlike many watches, the reversible structure requires careful attention during positioning. We recommend entrusting this operation to a professional or contacting Casati Milano via WhatsApp for step-by-step guidance to ensure correct installation.

Can I use an aftermarket strap on my Reverso Q397843J?

Yes, you can use aftermarket straps provided they strictly comply with the 20 mm lug width. Casati Milano's artisanal straps are bespoke-crafted specifically for this measurement and ensure mechanical and aesthetic compatibility. Avoid generic straps: the Reverso deserves dedicated craftsmanship.

How long does a leather strap last on the Reverso Q397843J?

The durability of a leather strap depends on the quality of craftsmanship and the type of leather. Excellent alligator or shell cordovan can last 3–5 years with regular wear and proper care. Vegetable-tanned calf typically lasts 2–3 years before requiring replacement. Casati Milano straps include 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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only