Here is the ad: The text, and your challenge: " GP chose 7 crations to group them in the " Selection " Collection. Ok, they show one of them, the Gyromatic 39 Jewels Ref 7317. Any idea about the 6 others? Doesn't that remind you the Jubil collection fro...
Not sure if the text actually refer to a specific collection like the JLC 125 Jubilé. The ad is from 1960, but the 170 anniversary would be in 1961... I haven't found any document showing a special collection of 7 pieces. But I still don't have that much ...