1965: Girard-Perregaux designed the first mechanic movement at high frequency, at which the balance beats at 36,000 vibrations/hour: the Gyromatic HF.

1967: Girard-Perregaux receives the Centenary Award from the Astronomical Observatory de Neuchatel in recognition of the accomplishments of the Manufacture generally, and specifically for the Observatory Chronometer wristwatch that used the Gyromatic HF. In fact, Girard Perregaux reap 662 Observatory certificates with its regular production line High Frequency chronometers - 73% of all such certificates delivered for "mechanical wrist watches"; twice as many as all other brands combined.