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Girard Perregaux Ref. 8004 F and Gyromatic 39 jewels square

 

Hi everyone,

Here is one of the Damier from GP that I own, as per GP, the caliber inside it is a GP 26-38 dating from 1964-1965, I cant find any informaiton on it, even on Ranfft Watches web site. Does any of you know more about this caliber? The only infromaiton I got is for the Girard-Perregaux 26.3  based on the AS 1758...
Thx!





This one is slightly different, based on the Gyromatic caliber with 39 jewels, could be a GP 32.19 ..."... two roller freewheels are used to convert the rotor movements. While usually steel rollers are used, this top model has ruby rollers (six in each freewheel)..." taken from Ranfft watches...




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