We are Super honored to be given access to Edward Tinker’s valuable input , including pdf files for our magazine research. Today world renowned Luger Accessories expert Klaus chimed in ,using his native German tongue . @segadreamcast was able to translate for us, and viola, we have some traction on magazine studies. Thank you to all !  I included a hot link to Lugerforums, if you are not a member , join!!! 
https://www.lugerforums.com/threads/p-08-magazine-body-finishes.132386/post-1057387