Patek Philippe Ref. 738, pocket chronometer, so-called “Deck-Watch”, especially made for scientific purposes, Guillaume balance, Bulletin of the Astronomical Observatory of Geneva, Honourable mention; silver | | Geneva, November 5, 2022
, Patek PhilippeRef. 738, pocket chronometer, so-called “Deck-Watch”, especially made for scientific purposes, Guillaume balance, Bulletin of the Astronomical Observatory of Geneva, Honourable mention; silver Very fine, silver (0.925), open-face, keyless-winding, round-shaped, pocket chronometer, so-called “Deck-Watch”, especially made for scientific purposes, with subsidiary seconds at 6., Silver colour dial, with large suspended Arabic numerals; blued steel “Spade” hands., 19’’’ movement, rhodium-plated, going barrel, straight-line lever escapement, cut bimetallic compensated Guillaume balance with gold poising screws and blued steel hairspring with terminal curve, polished steel index-regulator with swan-neck spring and micrometric screw, adjusted by the precision timer “régleur” H. Wehrli, Geneva, “Poinçon de Genève” (Geneva Quality Hallmark or Geneva seal) stamped twice. Brand Patek Philippe, Geneva
Model “Deck-Watch” having won a First Class Bulletin de marche from the Astronomical Observatory of Geneva (Honourable mention with 624 points)
Reference 738
Year 1921
Movement No. 191 008
Case No. 625 943 (by “FFBA”, Fédération de Fabricants de Boîtes Argent, S. Graber, Renan)
Material silver
Diameter 60 mm.
Caliber 19’’’, straight-line lever escapement, Guillaume balance, index regulator with swan-neck spring and micrometric screw
Signature dial, case and movement
Accessories Extract from the Archives, copies of the Bulletin of the Astronomical Observatory of Geneva (1932, 1933 and 1934)
