G Tuning Fork Watches
The first prototype mechanical tuning fork clock, the 'pendule ç diapason', was
manufactured by Louis F. Breguet, grandson of the famous Abraham-Louis Breguet.
Louis Breguet filed the patent for this clock in France on October 26, 1866, and a
supplement on March 13, 1867. An Irish watchmaker sold this watch in 1961 to the Firm
Breguet in Paris, who sold it again a few years later to an unknown collector.
Louis Breguet also introduced a clock with a vibrating blade and even mentioned a clock
with two tuning forks and another one with two vibrating blades.
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