The Girard-Perregaux Reference 9444 was the first production quartz watch from Girard-Perregaux, housing the famous Caliber 350 or later variants. This inhouse developed wristwatch quartz caliber was a true breakthrough in terms of accuracy and battery life and had set a few standards still in practice today.
Go back and read my detailed report on the Quartz Revolution by GP:
background/report: Girard-Perregaux and the quartz revolution
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The Girard-Perregaux Reference 9444 was the first production quartz watch from Girard-Perregaux, housing the famous Caliber 350 or later variants. This inhouse developed wristwatch quartz caliber was a true breakthrough in terms of accuracy and battery life and had set a few standards still in practice today.
Go back and read my detailed report on the Quartz Revolution by GP:
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