A set of these same 2 cards sold on HA, last May
"A set"? I would suggest they are the exact same cards.
But along with Bruce, I also question whether they are studio issued cards. My guess is that they are enlargements possibly produced by an independent theater taken from either the pressbook, or made from original cards (perhaps even by an early collector in the 60s).
No way Universal allows cards like this to go out with their logo so mangled as to be unreadable like on the top card.
If it weren't for the fact that they are 11" x 14" I would suggest they were taken from an early fanzine, something like Raymond Stuart's
Famous Horrors of the Screen fanzine or something.