I took the back off and it has a stamp FH on the inside case and the number “5” as well as a “5” on the inside of the back cover. The weights have “420 BU” on them. But I could not see any sticker indicating it is a Certified Black Forest clock. So I assume it might be a knockoff from the post WWII West Germany??? Or could the sticker have since fallen off? I know it isn’t a high end clock, but for my own knowledge, it would be nice to understand some of the history so when i pass it on to my son, he will have the history. I have spent hours searching on the internet, including some of the resources you mentioned on your site, but cannot find out anything about this clock. Thank You.