Longines, Valjoux 15''' powered, one-push chronograph, yellow dial with breguet indexes, 14 karat yellow gold, ø 39 mm, circa mid-1930s.
This oversized chronograph is equipped with a Valjoux-based Cal.15''', which was produced only for a short period of time from 1933 to 1935, during the transition from the in-house chronograph movement Cal.13.33 to Cal.13zn. The yellow Breguet dial, with its beautiful hue, is beautifully designed with Breguet indexes and blued steel hands. The hinged case, made of 14k yellow gold, has a coin-edged design with a double back cover (the inner cover is also made of 14k gold), and the inner and outer covers are engraved with unique numbers common to the machine. The inner cover is engraved with a unique number shared by the machine and the front cover, and the inner cover is engraved with an indication that it has the function of a computer at that time, and an indication that it won 10 awards at watch expositions.