I have a Foth Derby that was my grandpa's during WWII. He arrived on Normandy beach the day after D-day. I'm not certain where he bought the camera, but it was definitely in Europe. My post is definitely a "for what it's worth" kind of post, but I find it interesting that you're researching this camera specifically. What is its appeal to you?
If you can find these resources in Lawrence, KS (the University of Kansas), I'll be glad to go make copies or scans.