This mighty weird advertising card describes the BGA Velectrik derailleur as being the ‘dream of champions’ - apparently because it is cable-free.
The apple-cheeked champion in question appears to be wearing eye shadow and lipstick - very avant-garde. And with his moveable head, he is clearly in some kind of dream, or, perhaps, just a little stoned.
Browse associated derailleurs.
BGA Velectrik 1935?