lot 53

Jaeger-LeCoultre

Reverso Gyro-Tourbillon Ref. 247.6.07 Pièce Unique

This lot has a reserve price
Estimate CHF 60 000 / CHF 100 000
Starting bid CHF 60 000
Location
Office, Zurich

Hammer price CHF 90 000
Total bids 9
Buyer’s premium will not be charged

Specification

CaseRectangular reverso case in platinum with sapphire crystal on both sides, crown at 3 o'clock with emerald cabouchon
StrapBlack alligator leather strap with JLC butterfly deployant clasp in platinum
DialOpenworked dial with hours and minutes in the upper half, visible gyro-tourbillon in the lower half, signed 'Jaeger LeCoultre' at 6 o'clock of the time dial, power reserve on the flip-side
MovementOpenworked hand-wound movement Cal. 174, functions: hours, minutes, gyro-tourbillon
Cal.174
Ref.247.6.07
Movement No.609067
Case No.2669048 (Piece Unique)
Diameter:36mm
Lug-to-lug55mm
Year2010

Condition report

Case:Good, signs of wear, broken cabouchon
Strap:Good, signs of wear
Dial:Mint condition
Movement:Good, all functions working properly
Papers:Yes

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.