THE book on these German rifles is
Steinschloss-Jägerbűchsen, Erhard Wolf ©2006, hardcover, in a case. It is in German, very well illustrated. Got mine from Jim Chambers, he used to have an English translation, spiral bound. Believe he still has the German books, maybe $145.
If not, look into
www.germanguns.com. You just might find something fascinating there.
The late Mr. Shumway published some Jaeger articles in Muzzle Blasts, made available bound together.
Jaeger Rifles is available from
www.shumwaypublisher.com for $35, plus (I assume) shipping.
You have some fine photos. For Ancient Ones such as I, born some years B.C. (Before Computer) you might want to give a hint as to how to stop that Wonderful Slide Show so one might look closely at them.