Patek Philippe & Cie, Genève, No. 178391, case No. 284041. Produced circa 1917.Very fine, rare, large and early tonneau-shaped curved 18K yellow gold gentleman's wristwatch. wo-body, solid, polished, hinged cover, gold screw bars, "bombe" crystal. champagne with painted radial stylized Arabic numerals. "Breguet" blued steel hands. Notes Similar watch is published in "Patek Philippe Wristwatches", by Martin Huber and Alan Banbery, 1998, p. 99.