Need more information. Start with the manufacturer or trade name marked on the rifle. I can find 50 or more models that COULD have a 7-digit serial number with a B prefix.
The year is not so precise and varies depending on the author.
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.