circa 1930, the champagne dial with square chequerboard detailing marked CHRONOMETRE LONGCHAMP, 43mm diameter, with gold coloured Arabic numerals, cathedral hands, subsidiary seconds register at 6 o'clock and dot minute track, 15 jewel mechanical crown wind movement with pumpkin shaped winder, case, 50mm diameter, both covers hinged at 9 o'clock and elaborately engine turned all over with foliate upper and lower bezels, verso interior numbered 77402 with Swiss mark for 18ct gold, together with Poinçon de Maître: Hammer With Handle number 102 for Amez-Droz & Cie., and additional personal engraving, the cuvette similarly marked, and additionally engraved PRTECISION ANERE QUALITE SUPERIEURE LEVEES VISIBLES 15 RUBIS 71.4g gross