Important Modern & Vintage Timepieces

Geneva, May 14, 2017

LOT 490

RETROGRADE PERPETUAL CALENDAR Henry .Robert . Ekegrèn, Geneva, 'Quantieme Perpetuel', case No. 16788, Made circa 1870. Very fine and rare, open face, keyless 18K gold pocket watch with perpetual calendar with fly-back date.

Four-body, bassine et filets, polished bezel and band, engine- turned back cover with an engraved foliate monogram highlighted with black enamel. Hinged gold glazed cuvette. White enamel with radial Roman numerals, outer dot minute divisions and Arabic five-minute numerals, subsidiary dials for the seconds and the months, aperture for the days of the week, retrograde date sector. Blue steel spade hands. 19''', matte gilt, 15 jewels, wolf's tooth winding, straight line lever escapement, cut bimetallic compensation balance with gold meantime and temperature adjustment screws, blued steel Breguet balance spring with overcoil, swan-neck micrometer regulator. Punched inscription for Ekegren recording a gold medal in Paris in 1867.