Thanks for all the info! Now the whole thing makes sense
I wonder if I could ever use it, but I doubt it. Maybe theres someone here thats really interested in the (to me quite) weird thing, because I don't think I can get it complete and get it to work. Its probably not worth much, so let me know if you could put it to good use!
Benelli (indeed great Italian motorcycles, but I drive a 1976 Benelli GTV50 moped )