I did a little internet searching tonight without any success. Chatham Fanning Mill was made by Mason Campbell & Sons in Chatham ONT. But I didn't see any connections to Massey. There seems to have been several fanning mill manufacturers in Racine around the Massey plants but I could not find anything that connects the dots. You have to wonder if there is confusion with "Massey" & "Mason" and "Clipper" fanning mills. Lots of similarities but I could not find anything concrete!!
Just my quick search!!
GTE