Short answer

"Reverse tribute duet" is a common misspelling of Reverso Tribute Duoface. A real Jaeger-LeCoultre Reverso Tribute Duoface has a carriage that slides on two rails and flips inside the outer frame, two dials run by one hand-wound calibre, and a solid outer back. Most fakes fail on at least one of those points.

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What the watch is

Jaeger-LeCoultre patented the Reverso case in 1931. A rectangular carriage sits inside an outer frame. You slide the carriage up, turn it over, and press it back. The Duoface puts a dial on both faces. The front dial shows the time and small seconds. The rear dial shows a second time zone and a day and night disc. One movement drives both dials.

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Case sizes differ by reference. The Reverso Classic Large Duoface measures 47 x 28.3 mm. The Medium Duoface measures 42.9 x 25.5 mm. Steel models use a hand-wound Jaeger-LeCoultre calibre with about 45 hours of power reserve.

How to Spot a Tribute Duet Jaeger-LeCoultre Fake Copy

Check 1: the carriage

The carriage moves on two metal rails and stops at both ends. The fit is tight, with no side play and an even gap around the frame. Fakes show stiff or loose travel, plastic rails, and a carriage that wobbles when the case is held by the frame.

Jaeger-LeCoultre Tribute Duet Fake Watch: A Practical Guide

Check 2: the second dial

The rear hands set apart from the front time. The day and night disc turns once per 24 hours. On many fakes the rear hands move only with the front time, or the day and night disc does not turn at all. Test this before you buy.

Check 3: the back of the case

Steel Duoface models have a solid outer back. There is no sapphire display back on a steel Tribute Duoface. Some fakes show a glass back and a rotor. Both parts are wrong. The genuine watch is hand wound, and the movement stays hidden.

Check 4: engraving and dial finish

Reference numbers and case numbers are engraved, not printed. Dial print is sharp under a loupe. Applied indexes have polished facets and sit flush on the dial. Fake dials show soft print, uneven gaps around the markers, and a flat sunray finish.

Check 5: price

A new steel Reverso Tribute Duoface lists above USD 9,000 from an authorized dealer. Offers at a small fraction of that price are fakes. Ask for the reference number, then match that number against the maker's product page.

What fakes copy

Fakes copy case shape, dial color, and strap from photos. They do not copy the two-rail carriage, the independent second time zone, and the solid back in one watch. Buy from a dealer with papers, or have a watchmaker open the case and identify the movement.