Following on from Aly's comment on the armoured car, there is a very useful series of books/transfers relating to the Tintin books. These are by Blue Rider Publishing. The etc is because, as the link shows, the publishers also make transfers and publish a lot of aircraft markings books and pdfs! Very useful are the Insignia magazine samples - haven't downloaded any magazines but, again, well worth looking at!
I don't want to put any more pictures here - better to follow the links, including looking at some of the sample pages from the Insignia magazine.