Thought I would throw some very obscure mosquito trivia in here, they were built in both UK and Canada, my father who made it all the way to 96 years old repaired them, fixing holes and making holes installing cameras. He told me due to the different glues, moisture etc between UK and Canada he could always tell where it was made when working in them.
As for the roles there's a lot with the different marks, as above lots of good books out there, think I have most of them. Even found the pilots manual that I have had for years, coming in very useful now.