I have a Cast Iron Early Mickey / Mortimer Mouse Head Mould

I've recently acquired this early Mortimer Mouse / Mickey Mouse Cast Iron Head Mould. It appears to have been a production piece. I am actually trying to find more information on this piece, as to what,when & where
it was used. My guess is it made rubber heads for a stuffed doll or hand puppet.

Any help would be greatly appreciated, I also have another cast mould like this one of Olive Oyl