Important Modern & Vintage Timepieces

Hong Kong, Jun 25, 2010

LOT 310

Roger Dubuis Platinum Sympathie Bi-Retrograde Perpetual Calendar Chronograph Roger Dubuis, Horloger Genèvois, "Sympathie ? Bi-Retrograde Perpetual Calendar Chronograph Chronometer", No. 04/28, movement No. 77, case No. 197992, Ref. S37 5637 8. Made in a limited edition of 28 examples, sold on October 18th, 1999. Very fine and rare, "carré lobé", water-resistant, platinum "Bulletin d'Observatoire" chronometer wristwatch with square button chronograph, register, bi-retrograde perpetual calendar, moon phases and an 18K white gold Roger Dubuis buckle. Accompanied by fitted box, the certificate of origin, chronometer certificate, additional solid case back 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 with screw bars, sapphire crystals. D. Two-tone black with applied white gold pyramidal indexes, outer fifths of a second and minute track, subsidiary dials at 12 for the months and the leap years, at 9 for the seconds and 3 for the 30-minute register, on the sides, sectors for the retrograde days of the week and of the month, aperture for the moon phases. White gold alpha hands. M. Cal. RD 5637, stamped with the Seal of Geneva Quality Mark, rhodium-plated, fausses cotes decoration, 21 jewels, straight line lever escapement, monometallic balance adjusted to 5 positions, shock absorber, self-compensating Breguet balance spring, swan neck micrometer regulator. Dial and movement signed, case hallmarked and numbered. Dim. 38 x 38 mm. Thickness 12 mm.