1971 Longines Ultronic. Electronic controlled by turning fork cal. ESA 9162, exactly the same used by the Omega f300 Hz.

The f300 movement was developed by ESA, an update by Max Hetzel of the original Bulova tuning fork . ESA supplied these to many companies inc; Longines, IWC, Baume & Mercier, Tissot, Omega, etc… Although more accurate than mechanical movements, tuning fork movements were quickly replaced by quartz movements, which became cheaper to produce and more accurate.

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.