This watch was built to be hit.
British officers stationed in India kept destroying their wristwatches on the polo field. The answer was not a thicker crystal. It was a case that turns over, so the glass faces the wrist and only metal faces the mallet.
Decades later somebody looked at that blank back and saw wasted space. They put a second dial on it. One watch, two faces, flipped with a finger.
This is how that happened, how to read both dials, and what to check before buying one used.
Key facts
- The reversible case was not designed by Jaeger-LeCoultre. It was patented by René-Alfred Chauvot, a French engineer, on 4 March 1931. The patent published as FR712868A in October 1931.
- Chauvot's original swivel mechanism used 23 parts.
- César de Trey, a Swiss businessman, acquired the patent rights and commercialised the watch. Jacques-David LeCoultre supplied the movement.
- The polo story is real: de Trey was travelling in India when a British army officer challenged him to build a wristwatch that could survive a match.
- The second dial came much later. The Reverso Duoface arrived in 1994, sixty-three years after the patent, driven by Calibre 854.
- The Grande Reverso Duo Ref. 273.2.85 is 18k rose gold, 48.5 x 29.5mm, on the hand-wound Calibre 986 with 19 jewels, straight-line lever escapement, shock protection and adjustment to five positions.
- Front: silvered engine-turned dial, black Arabic numerals, blued sword hands, small seconds, date. Reverse: black engine-turned dial, second time zone with a day and night indication.
Contents
- 1931: what actually happened
- Why a case that flips
- The detail almost nobody photographs
- 1994: the back becomes a dial
- The Grande Reverso Duo Ref. 273.2.85
- How to read both faces
- What to inspect on a pre-owned Reverso
- Frequently asked questions
1931: what actually happened
The Reverso was not a Jaeger-LeCoultre invention. The credit is usually collapsed into one name because one name now owns it, but the record is clearer than that, and collectors should know the difference.
René-Alfred Chauvot, a French engineer, filed a patent on 4 March 1931 for a watch that could slide within its carrier and turn completely over on itself. The mechanism ran to 23 parts. César de Trey bought the rights and turned the idea into a product. Jacques-David LeCoultre built the movement that went inside it.
What Jaeger-LeCoultre has done since is keep it alive for more than ninety years without losing the shape. That is a different achievement, and arguably a harder one.
Why a case that flips
Polo is played at speed with a stick. A wristwatch in 1931 meant a domed crystal sitting proud of a soft metal case, and it did not survive contact. De Trey heard the complaint directly from a British officer in India and went looking for an engineering answer rather than a stronger material.
The solution was subtraction. Rather than armour the glass, remove it from the line of fire. The case slides in its cradle, rotates 180 degrees, and locks with the dial against the wrist. What faces outward is a flat plate of metal with nothing to break.
The reeded ends, the godrons, are not decoration. They are the grip surface that lets a gloved hand find the case and turn it.
The detail almost nobody photographs
Look at the cradle in the image above. The inside of the carrier, the part that only exists to hold the case and that nobody sees while the watch is being worn, is guilloché decorated.
There is no functional reason for that. It is finishing applied to a surface visible for the two seconds it takes to turn the watch over. It is also the fastest way to judge an example in person: on a well-kept Reverso the pattern in the cradle is crisp, because it is one of the few gold surfaces on the watch that a polisher has no easy access to.
1994: the back becomes a dial
For sixty-three years that solid back was a blank canvas. Owners engraved it with initials, regimental crests, enamel miniatures. Then in 1994 Jaeger-LeCoultre put a movement behind it.
The Reverso Duoface shows two time zones from one movement. A single going train drives both displays through separate hands, so there is no second movement, no extra winding, no independent setting to keep in sync. Flip the case and you are reading a different hour off the same barrel. Calibre 854 did it first.
The Grande Reverso Duo Ref. 273.2.85
The Grande Reverso is the larger case, sized for a modern wrist without redrawing the 1931 proportions. Ref. 273.2.85 is the 18k rose gold execution on the hand-wound Calibre 986.
| Reference | 273.2.85 (also catalogued as Q3742421 and Q3742521) |
| Case | 18k rose gold, 48.5 x 29.5mm, rectangular with reeded ends, rotating within its back plate |
| Calibre | Jaeger-LeCoultre 986, manual winding |
| Jewels | 19 |
| Escapement | Straight-line lever, monometallic balance, self-compensating balance spring, shock protection |
| Adjustment | Heat, cold, isochronism and five positions |
| Front dial | Silvered engine-turned, black Arabic numerals, inner minute divisions, blued sword hands, small seconds, arced date aperture below twelve |
| Reverse dial | Black engine-turned, index markers with Arabic quarter numerals, second time zone, day and night indication |
| Strap | Alligator with 18k rose gold buckle |
Manual winding is the point, not a compromise. An automatic rotor needs depth, and depth is the one thing a Reverso cannot spend: the case has to sit thin enough to turn inside its cradle and still clear a cuff. Calibre 986 is what allows two dials in a case this slim.
How to read both faces
Silver for the day. Black for the night. The dial colours are not styling, they are a legend.
- Front, silvered: your local time, plus the date. This is the face you wear at your desk.
- Reverse, black: home time, or the time where the person you are calling is. The day and night indicator answers the only question that actually matters on a second time zone, which is whether it is a reasonable hour to ring.
Both are driven by one barrel. You wind once.
What to inspect on a pre-owned Reverso
- The swivel action. Slide and rotate the case slowly. It should move without grit and lock positively at both ends. Play in the cradle is the most expensive fault on a Reverso and the one most often described as "normal wear" by sellers.
- The godrons. The reeded ends are the first casualty of over-polishing. If the ridges read soft or rounded rather than crisp, the case has been worked. On gold this is unrecoverable.
- The cradle interior. Swing the case clear and look at the decoration inside the carrier. It is the hardest surface on the watch for a polisher to reach, which makes it the most honest record of how the case has been treated.
- Case edges. A Reverso is defined by flat planes meeting sharp corners. Rounded corners mean lost metal, and on 18k that means lost value.
- Engine-turned dials. Guilloché does not survive refinishing. Look for crisp, even machining under magnification. A soft or blurred pattern signals a redone dial.
- Winding feel. Calibre 986 is hand-wound. The crown should be smooth and consistent through the whole wind, with no slip or gritty spots.
- Buckle. The 18k rose gold buckle is a meaningful part of the value on a gold Reverso. Confirm it is present, hallmarked and original.
- Caseback markings. On a Duo the second dial occupies the back, so reference and serial sit on the cradle. Verify they are present, legible and consistent with the papers.
- The set. Box, guarantee certificate and the Duoface booklet. On a two-dial Reverso the booklet is reference-specific, so a set with it intact is materially stronger than one without.
Where the Reverso sits
The Reverso is not a watch that trades on scarcity. It has been in continuous production since 1931 and Jaeger-LeCoultre has never stopped making it. What it trades on is that no one else can make one: the shape is the whole product, and it is not available anywhere else at any price.
That makes condition unusually decisive here. On a round steel sports watch a polished case costs you some value. On a rectangular gold Reverso, where the entire design is flat surfaces, crisp corners and machined ridges, a polished case costs you the design.
Frequently asked questions
Who invented the Reverso?
René-Alfred Chauvot, a French engineer, patented the reversible case on 4 March 1931. César de Trey acquired the rights and commercialised it, and Jacques-David LeCoultre supplied the movement. Jaeger-LeCoultre has produced it ever since, but the case was not its design.
Why does the Reverso case flip?
To protect the crystal. British officers playing polo in India were breaking their watches, so instead of strengthening the glass the case was made to turn over, presenting a solid metal back to any impact.
What is the difference between a Reverso and a Reverso Duo?
A standard Reverso has a plain metal back. A Reverso Duo, or Duoface, has a second dial on that back showing a second time zone, driven by the same movement. The Duoface was introduced in 1994.
Does a Reverso Duo need winding twice?
No. Both dials run from a single barrel and a single going train. One wind drives both faces.
Is the Grande Reverso Duo automatic?
Ref. 273.2.85 is hand-wound, on Calibre 986. Manual winding keeps the case thin enough to turn inside its cradle and still sit under a cuff.
What size is the Grande Reverso Duo 273.2.85?
The 18k rose gold case measures 48.5 x 29.5mm, rectangular, with reeded ends.
The example we handled
A Grande Reverso Duo in 18k rose gold, Ref. 273.2.85, a full set in excellent condition, passed through our collection at $19,250. It has since sold.
We source Reverso references regularly. If you are looking for a specific configuration, in gold or steel, Duo or monoface, tell us the reference and we will look for it rather than sell you what happens to be in the case.
Looking for a Reverso
Every piece we list is authenticated in hand by our physician-led vetting team, and on a Reverso that means the swivel cradle, the godrons and the dial finish are examined under magnification before anything reaches the site.
Sources
- Monochrome Watches, In-Depth: The History of the Almost Century-Old Jaeger-LeCoultre Reverso: the Chauvot patent date and number, the 23-part mechanism, the roles of de Trey and Jacques-David LeCoultre, and the 1994 Duoface with Calibre 854.
- SwissWatchExpo, Jaeger-LeCoultre Grande Reverso Duodate Rose Gold 273.2.85: case dimensions, Calibre 986, jewel count, escapement and adjustment, and both dial descriptions.
