Longines, rarissimo orologio da uomo in oro Lot n° 2451

Longines, very rare yellow gold men's watch with leather strap, powered by the first flyback chronograph movement sold to the public in 1936. Patented in 1934 and known as 15'' or zn13 it was based on modification of the famous valgioux 22GH. This 40 mm diameter watch has porcelain dial in splendid condition, with minor defects only under the chronograph minute counter at 3 o'clock, black tachymetric and red telemetric balance spring, Arabic numerals at 12 and 6 o'clock. Large heavy case with hinged case back is in excellent condition as is the newly overhauled movement. Weight g. 58.78