Try the P38 forum.
1961
Try asking on the p38forum.com
Ruger never made a model called the P38.
9mm luger.
Yes.
Try the P38forum
You will need to contact Walther to find out.
P38
Someone at the P38forum.com should be able to help
Someone at the p38forum.com will probably be able to help you.
p38forum.com; the library, the internet.
You will have to find a copy of Dieter Marschall's book.