#9 - USA , short lived car
#11- European - not Belgium or Switzerland ...his brother is very "famous"
#12- Not Europe , USA, Canada, Australia, Japan
#15 - European - Not GB - not Germany - not France - not Belgium - Not Swiss - Not CZ - the same country of #17
#17 - European - not GB - not Germany - not France - not Belgium - Not Swiss - not CZ -the same country of #15
#18- USA - not in a French or American or British Museum
#19 - French - not Cottereau - National - Delaunay-Belleville - CLC - Le Gui
#15 & 17 - Italy? (#17 seems like a FLAG)
#11 - The maker's brother?
#12 - South America?