Union Horlogère, Bienne-Genève, circa 1915
Vente aux enchères Antiquorum N°125 - 17 juin 1994 - Lot N°99
C. Four body, "bassine", polished. Gold cuvette. D. White enamel with Arabic numerals, outer minute and chronograph ring, apertures for the days of the week and the months, subsidiary dials for the dates and the seconds with inner moon phase aperture. Gold "Louis XV" hands. M. 20"', gilt brass, 26 jewels, straight line lever escapement, cut bimetallic balance, Breguet balance spring. Repeating on gongs with push piece in the band. Chronograph with visible work, push piece in the band. In good condition. Diam. 57 mm.