So, as this fine seller makes quite clear, the spider is missing. You can see the attachment area in the middle-lower-right section. Beistle produced this set for three short seasons during the 1950s. Ultimately, I think they were unsuccessful because of what you see here - the attachment goes missing. As I point out on page 158, given the extra labor involved to attach something to a flat paper surface and the very real prospect of that attachment getting bent up or falling off, I feel Beistle personnel threw up their hands and said, “Uncle!”
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Mark B. Ledenbach's vintage Halloween collectibles blog.