The Collection of a European Nobleman

Geneva, May 11, 2008

LOT 93

Sympathie ? Tourbillon Bi-Retrograde Perpetual Calendar Roger Dubuis, Horloger Genèvois, "Sympathie ? Tourbillon Bi-Retrograde Perpetual Calendar Chronometer", No. 20/28, movement No. 54. Made in a limited edition of 28 pieces, sold on September 26, 2005. Very fine and rare, "carré lobé", water-resistant, 18K white gold, "Bulletin d'Observatoire" chronometer wristwatch with oneminute tourbillon regulator, bi-retrograde perpetual calendar, moon phases and an 18K white gold Roger Dubuis deployant clasp. Accompanied by the certificate of origin, chronometer certificate and setting pin.

C. Three-body, solid, polished and brushed, transparent case back with 8 screws and etched crystal, correctors on the band, lapidated bezel, curved lugs, sapphire crystals. D. Two-tone white and gray mother of pearl with applied white gold faceted dart indexes, outer minute track with Arabic five-minute numerals, subsidiary dials at 6 for the months and the leap years, at 12 for the seconds, on the sides, sectors for the retrograde days of the week and of the month, aperture for the moon phases. Polished and frosted white gold alpha hands. M. Cal. RD 2002, stamped with the Seal of Geneva Quality Mark, rhodium-plated, oeil-de-perdrix decoration, brushed gold bridges, 29 jewels, one-minute tourbillon regulator with steel cage, lateral lever escapement, monometallic balance adjusted to 5 positions, shock absorber, self-compensating flat balance spring, index regulator. Dial, case and movement signed. Dim. 40 x 40 mm. Thickness 15 mm.