Important Collector's Wristwatches, P...

New York, Sep 17, 2009

LOT 309

18K White Gold Tourbillon Orbital, Piece Unique Jean Dunand, Tourbillon Orbital, No. IO1886. Sold in November 2006. Unique 18K white gold wristwatch with revolving one-minute flying tourbillon, reverse moon phase indication and back-wind and an 18K white gold Jean Dunand buckle. Accompaned by the original certificate, instruction leaflet, original wooden fitted box containing gloves, a loupe and various tools and a travel case.

C. Massive, two-body, polished, engraved caseback with 8 specially milled screws, folding back-wind, aperture for the moon phase with quick set function, 3 sapphire crystals including two in the band one for movement viewing, the other for power reserve indication. D. Black, center engine-turned, outer minute divisions, aperture for the revolving one-minute tourbillon cage. Luminous hands. M. Cal. IO200 by Christophe Claret, 14 jewels, revolving one minute flying tourbillon combined with constant seconds, rotating movement double ball-bearing triple rotation using one rigid plate and two mobile plates, mainspring barrel and going train rotate around the central ball-bearing system. Dial, case and movement signed. Diam. 45 mm, thickness 17 mm.