Patek Philippe: A Rare Silver Open Faced Keyless Lever Deck Watch with Guillaume Balance, signed Patek Philippe & Cie, Geneve, ref:739, Movement No.178858, Case No.626007, retailed by A.Lunser, Berlin, Movement manufactured circa 1916, Encased in circa 1941, (calibre 21) manual wound lever movement signed Patek Philippe & Cie and numbered 178858, movement stamped twice with a Geneva seal mark, Guillaume split bimetallic balance with a blued overcoil hairspring, micrometer regulator, wolf's tooth winding, silvered dial with Arabic numerals signed Patek Philippe & Cie, Geneve and numbered 178858, blued steel hands, plain polished case stamped inside with maker's mark Patek Philippe & Co, Geneve and numbered 626007, stamped with Swiss silver marks 0.925 and FFBA for (Federation Fabricants De Boites), cuvette inscribed with retailers signature A Lunser, Berlin
60mm wide

Patek Philippe references 738 and 739 was introduced in the late 1930's for navigational purposes. This present watch is the reference 739 which has the high quality calibre 21 Guillaume bimetallic balance high movement which is stamped twice with the Geneva seal standard mark. The Guillaume balance is comprised of steel and nickel alloy with anti-magnetic properties which is not affected by varying temperature changes. Patek Philippe used earlier made movements like this example which dates circa 1916 and later encased them like this case in the late 1930's/early 1940's. This present example has the retailers inscription on the cuvette inscribed A.Lunser, Berlin. Adolf Lunser was based in Berlin and retailed many high quality watches by leading watchmakers such as the well known German watchmaker A.Lange & Sohne and Swiss watchmaker Patek Philippe. This retailer supplied to the German Government, senior members, and for military/navigational purposes. This is a fine and rare example which will be a desirable timepiece for a watch collector.