1969 Longines Nonius Chronograph Fly-Back ref. 8225 manual winding movement cal. 538, 41 x 43.2mm. case.

This one has fine Longines cal. 538 on the basis of the legendary 30CH Fly-Back.

The name Nonius results from the Portuguese mathematician P.Nunes (1492-1577) who built instruments for the measure of time. It’s a very unusual model with a special 1/10th second chronograph hand, patented in 1971 and inspired by the caliper, which allows the owner to read the 1/10th time by looking to the number of the hand “in line” with the inclined concentric minute division.

Longines was founded in 1832, its winged hourglass logo is the oldest registered trademark for a watchmaker.
Longines provided timers used at the first modern Olympics in 1896.
In 1899, a Longines watch went to the North Pole with the Arctic explorer Luigi Amedeo of Savoy.
Charles Lindbergh, after his transatlantic flight, designed a pilot watch to help with air navigation. Built to his specifications, the Longines hour angle was introduced in 1931 and it is still produced today.
The company began to produce military issue watches for the second World War, most for the European forces.
Today Longines is owned by the Swatch Group.