These air guns are made in Japan and were distributed through Hawthorne New Jersey. I suggest you go online and search for "air gun repair" there are independent shops that repair air guns for a living.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.