Did you finally find some information ?
I have a similar question. I have a Rumag vertical miller RW V 16, fabrication date unknown (but old) and I am looking as well for information. It seems the Rumag works do not exist anymore. Do you know where I can find a manual or other information ?
you should check out ivnerell engineering, they have a wealth of knowledge about those old mills but unfortunatly they arent on the web, also a good place to check out is