1940s Longines"Stop Second Minutes Recorder" Rare Black Tachymetre Dial

Longines, "Stop Seconds Minute Recorder", with rare black tachymeter dial, rare movement Cal. 12.68z, circa early 1940s. With the rare caliber 12.68z, it adds a 60-minute counter to the normal stop-seconds model with a 60-second counter. By setting the hour and minute hands to exactly at zero, the chronograph can measure time for up to 12 hours. It is also equipped with a simple flyback function and is a rare example of Longines' originality at a time when various manufacturers were experimenting with the creation of chronographs. The black gilt dial, with a slight brown change in color, has a more detailed horizontal tachymeter display from 1000 to 900, 800 to 700, and the Arabic numerals are positioned in the center of the dial for a more condensed design, with a minute recorder function that is unique to the medium four-hand model The mechanical look is also fascinating.