Hi Matt,
To get back on topic, the answers you seek may well be in a book that I have in my 'to read' pile. I bought this some time ago and flicking through it, I think it is a book you will want for yourself. The photography is superb and I think you will find it useful as well as entertaining.
The book is entitled Alte Scheibenwaffen Volume 1: Old German Target Arms and the book includes target shooting history in Germany up until WW2.
The are copies available through Abe books - the ISBN is 0-9707608-3-3
I'll need to read my copy one of these days as there is an article in there I'm sure!
Kind regards,
John
Currently looking for Baikal Makarov pistols with the following prefixes to the serial number: 98, T01, T09, T21, T22
Prefer boxed or cased but will consider loose examples too.