1501: It's Italian and the name is formed by more words...not surnames.
1601: Yes! Which one? Just a number is missing.
10701: Not Garavini. It's an italian coachbuilder, one of the biggest ones.
1501 : I don't have the Etceterini Register. My last guess will be Pasqualin Parisotti, even if the only car I'm aware of is a Lancia. If that's not good, I'll try #1701
1601 : ALCO first built some Berliets Under license. Maybe ALCO (2) ?
10701 : Pininfarina ? It built a Lancia Astura Victoria Coupe. If I'm right, please give me #10801
Thanks. Have a nice weekend