See book: Dictionnaire Des Horlogers Genevois by Osvaldo Patrizzi - page 274: MERIMONT WATCH Co. The watch lies in a 14 Kt yellow gold open face case with a smooth finish and engraved monogram: "WJF". The case has wheatear edging. The inner side of the case and cuvette are stamped for 14 Kt gold and numbered: 213952.
The casemakers initials: "AWC Co". Signed: Vacheron & Constantin - Swiss Made - 1920. Diameter: 45 mm - Total Weight: 7.6 gr. Vacheron & Constantin was founded in 1755 in Geneva by the watchmaker and historian Jean-Marc Vacheron.
In 1819, Francois Constantin joined the firm. His main task was to travel to France and Italy to sell the watches. Georges Leschot came to the firm in 1839 to help accomplish the biggest challenge of the time, the mechanical manufacture of watch parts. In 1880 the firm adopted the Gross of Malta as their emblem.
In this period, they were pioneers in the development of the watch-bracelet. Today they remain innovators, creating high quality pieces with all of the most complicated mechanisms such as chronographs, repetitions and calendars.