1966
1 references catalogued.
Named for the year Girard-Perregaux's high-frequency calibre won the Neuchâtel Observatory's chronometry prize, running at 36,000 vibrations per hour when the industry standard was 18,000. The watches carrying the name are deliberately plain dress pieces; the reference is to the achievement, not to a 1960s design.
References
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References without production years are catalogued but do not yet carry a verified production record. Those fields are added as they are confirmed rather than estimated.