Reverso Gyro-Tourbillon Ref. 247.6.07 Pièce Unique

Reasons to Bid

The Reverso Gyrotourbillon 2, also known as the Reverso Hybris Mechanica 174, was introduced in 2008 for Jaeger-LeCoultre’s 175th anniversary and produced in three limited editions: 75 pieces in platinum, 75 in 18k rose gold (the present reference), and 20 in white gold. It represents the continued evolution of the brand’s multi-axis tourbillon concept first launched in 2004 and is notable as the first spherical tourbillon designed specifically for a rectangular movement. Caliber 174 was engineered to meet the challenges of fitting a multi-axis tourbillon inside the Reverso case while improving overall chronometry. It features a helical hairspring inspired by John Arnold’s 18th-century invention, a solid-gold high-inertia balance upgraded to 4 Hz, and a fast-rotating tourbillon whose inner cage completes a revolution every 18.75 seconds. The watch’s precision was affirmed when the rose-gold version placed second at the 2009 Concours International de Chronométrie. The model also required a specially constructed 36 x 55 x 15.8 mm reversible case equipped with a safety bolt, adapted from the Reverso Grande Complication à Triptyque. True to its collector-oriented purpose, the movement received extensive hand-finishing: three-dimensional tourbillon carriages, circular-brushed wheels, polished screws, and bridges decorated with côtes de Genève, perlage, and clous de Paris, along with sharply finished interior angles—an exacting and rarely practiced haute-horlogerie technique. The present example is a bespoke piece in platinum 950, distinguished by a silvered, circular-brushed chapter ring in place of the transparent ring used on the standard edition. The outer case bears a commemorative engraving reading “100 1909 2009.” It was sold in 2010.