Awesome! Thank you for the recommendations! And if I can figure out how to get pictures on here, I’ll do it! It’s not in the best of shape, but it’s still pretty good for its age!Hello and welcome to the forum. Obviously the best place to start is the search function on this forum.
If you are looking for printed material;
The Krieghoff Parabellum by Randall Gibson 1980 Pages 129-138
The Mauser Parabellun 1930-1946 by Don Hallock/Joop van de Kant 2010 Pages555-562
The Borchardt & Luger Automatic Pistols by Joachim Gortz/Geoffrey Sturgess information is dispersed among the three volumes.
How about posting pictures of your KU?