The Reverso was born in 1931 so polo players could flip the case and protect the crystal, and nearly a century later the Tribute Duoface Calendar turns that party trick into two complete watches in one. The front is a grained silver dial with Dauphine hands and a full calendar, day, date, month, and moon phase, laid out with the Art Deco restraint the Reverso is known for. Flip the reversible steel case and a deep blue sunray dial appears, carrying a second time zone with a day/night indicator, ideal for anyone tracking home and away. Both faces run off a single movement: the in-house manual-winding Calibre 853, a rare rectangular caliber built specifically to fit the Reverso's shape, with 223 parts and a 42-hour reserve. It wears on JLC's interchangeable leather strap and comes with box and papers. Among the Jaeger-LeCoultre Watches at Grand Caliber, the Duoface Calendar is the thinking collector's dress watch.