Jaeger-LeCoultre Reverso Disassembly Guide
Vintage

Jaeger-LeCoultre Reverso Disassembly Guide

By quattro · Apr 5, 2026 · 15 replies
quattro
WPS member · Jaeger-LeCoultre forum
15 replies233 views17 photos
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Emmanuel, known as quattro on WatchProSite, offers a rare glimpse into the intricate engineering of a vintage Jaeger-LeCoultre Reverso. His detailed photo series disassembling a 1948 stainless-steel model, powered by the Calibre 437, provides invaluable insight into the iconic case design by Réne-Alfred Chauvot. This post is particularly relevant for collectors and enthusiasts keen to understand the mechanical artistry behind one of horology's most distinctive timepieces.

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Designed by French engineer Réne-Alfred Chauvot, the case of the Reverso is quite fascinating.

And I find it a pleasure to see the parts of which it is composed.

So, here's a series of photos showing the disassembling of a 1948 stainless-steel Reverso with a radium dial

The watch is powered by the Jaeger-LeCoultre calibre 437.

Enjoy!

Best, Emmanuel







Watch by Jaeger LeCoultre, Reverso




















credit: Benjamin Marcello


THE ORIGINAL DESIGN PATENT (the registration request was filed on March 4, 1931)






credit: Monochrome 

About the Jaeger-LeCoultre Reverso Classic Medium Duoface Ref. Q1548470

The Reverso stands as Jaeger-LeCoultre's most iconic creation, born from the practical demands of 1930s polo players who needed protection for their watch crystals during matches. The sliding and reversing case mechanism, developed in collaboration with French businessman César de Trey, became an instant classic that transcended its sporting origins. This particular Duoface variant represents the collection's evolution from pure utility to sophisticated complications, offering two distinct time displays within the same reversible case.

The Classic Medium Duoface showcases Jaeger-LeCoultre's mastery of case construction and dial finishing. The silvered guilloché dial on the primary face displays hours, minutes, and small seconds, while the reverse reveals a second time zone with day/night indication. The manual-winding Caliber 854A/2 movement, visible through the caseback configuration, demonstrates the manufacture's ability to maximize functionality within the Reverso's constrained dimensions. The rectangular case proportions maintain the original 1931 aesthetic while accommodating modern wrist sizes.

Within Jaeger-LeCoultre's contemporary lineup, the Reverso Duoface occupies a sweet spot between entry-level dress watches and high-complication pieces. The stainless steel case keeps pricing accessible compared to precious metal variants, while the dual-time functionality adds genuine utility for travelers. Market appreciation has remained steady, with vintage examples commanding premiums that reflect the model's enduring design relevance and mechanical sophistication.

Specifications

Case
stainless steel
Diameter
42.8mm x 25.5mm
Dial
silver

Key Points from the Discussion

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The Discussion
AM
amanico
Apr 5, 2026
Yes, a classic. The watch and the concept.

QU
quattro
Apr 5, 2026
I just like to see how the case is built.

Best, Emmanuel

CH
ChristianDK
Apr 5, 2026
Great series of pictures of a marvelous piece

It’s always interesting to see these old cases. I believe a lot of engineering has been done to the design but these have a warmth and charm like vintage cars. How did the restoration of your family heirloom go btw? Happy Sunday, E.

QU
quattro
Apr 5, 2026
Yes, the case engineering has probably evolved quite a bit.

Thanks for asking about the restoration of my grandfather's watch: the service has been delayed and the new estimated availability date is 24 April. I asked for confirmation of this date, as I will be in Paris at that time, which would be ideal for picking up the watch: but I have not received any confirmation yet (my email is from 10 days ago)... Fingers crossed! Best, Emmanuel

CH
ChristianDK
Apr 5, 2026
I cross my fingers for you

I forgot when you handed it in for service. Feels like s while ago, though. These projects take time but I’m sure it will bring lots of pleasure with the meaning it carries. It’s also interesting to see how well finished this movement and gears are. Not fancy but well made.

QU
quattro
Apr 5, 2026
The service started on February 21, 2025,

so a little more than one year ago and it was supposed to last 55 weeks, which implied a delivery on March 12. Anyway there's not too much waiting left, now. Thank you for your kind words.

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