I have never seen these Whitney designs before. Typically, they are on a circular base with rats running around the perimeter and stand with the help of a wire-backed prop. This standee form is unusual and rare. (Basically, at this stage I feel that anything I haven't seen before is rare! :)) I would have liked to see the reverse of each. I know that many Whitney designs were recycled during the 1990s. Although I feel these are older, seeing the backs would have helped. Whitney was pretty good about marking their postcards, but were awful about marking much else. Were these marked in any way?
Mark B. Ledenbach's vintage Halloween collectibles blog.