Here's a Ben Cooper Clown costume mask from the 1960's. The costume accompanying it claims to be a Hobo costume so I'm not sure if this is a mismatched pair or whether they were sort of interchangeable back then. I'm guessing mismatch.
This is a creepy devil mask from the 50's or 60's. No idea of brand though.
Lastly is this couple of masks from Wheaties and Kellogg's in the fifties. They did a lot of these on the backs of their boxes so kids could cut them out and wear them. Here's just two of them.