28,750 CHF
Patek Philippe – Silver Lever Chronometer Navigation Watch for Geneva Observatory Trial Patek Philippe & Cie. , Genève, "Montre de Torpilleur" No. 191011, case No. 625944, Ref. 738, made in 1921, sold on January 30, 1942. Exceptionally fine and rare, large, silver, keyless, "Extra" adjusted lever chronometer navigation watch with Guillaume balance adjusted by J. Golay-Audemars, entered for Geneva Observatory Timing Contest, category A, in 1927, achieving 636 points and Honorable Mention. Accompanied by the Extract from the Archives and copy of the Observatoire de Geneve Service Chronometrique Register. Four-body, "bassine", polished. Hinged silver cuvette. Brushed sand-colored silver, champlevé Arabic numerals, outer minute track, subsidiary seconds. Blued steel Breguet hands. 42 mm. (18’’’), rhodium plated, fausses côtes decoration, pillar plate under the dial with oeil de perdrix finishing, 23 jewels, 8 adjustments, very high quality straight line calibrated equidistant lever escapement, anibal-brass Guillaume compensation balance with poising wings on the balance arm, gold and platinum temperature and meantime adjustment screws, blued steel Breguet balance spring with inner and outer terminal curves, ruby banking pins in shape of small plates inserted into the bridge, punched twice with Seal of Geneva Quality marks, swan-neck micrometric regulator, special mainspring ratchet wheel click preventing overwinding and Maltese Cross stop work. Dial, case and movement si
Auctioneer:
Antiquorum
Date:
2011-03-27
