I have been looking at the words beneath the disc and have come up with this:
Le fecheur sera colle en CD sur le disque ci-dessus. Un fil reliant le point noir du gilet au point noir du triangel E. Lui fermeltra de lever sa ligne lorsquon fera pression sur ce fil le disque pivotera autour de la punaise F.
The fisherman will be sticking to CD on the disc above. A wire connecting the black point of the vest to the black point of triangle E. He will close his line when pushing on this wire the disc will rotate around the pin F.
I do not see a designation for a pin F for the disc to rotate around. To tell the truth I have also been wondering how they knew about CDs back then.
Hopefully someone else will come up with another translation that will be of better help.