I'm glad to see this seller listing some fine material. She is one of the rare long-time collectors who has long loved small paper. You would be hard pressed to find a nicer person in the hobby! You can buy from her with confidence. This mini-diecut is definitely something Hallmark issued, but I believe they issued this in the later 1920s through the early 1930s. They used this glossy stock with red backing only during that small interval.
Mark B. Ledenbach's vintage Halloween collectibles blog.