Beistle issued these in at least three packaging variants. One was under their "Party Helps" line with an envelope containing the three place cards shown in this listing. The stock number was 527. The second variant was for an envelope containing four place cards (still just the same three designs...) with the stock number of 757. In the envelope of four in the collection, the fourth is a duplicate of the owl. The third variant was an envelope with a plastic front containing six place cards with a stock number of 657. Interestingly, there are not two of each design but two ghosts, one witch and three owls. One could surmise then that the owl is the most common of the three designs and the witch the least common. I don't know if that is correct, but if you happen to have either of the final two variants, please check the contents and let me know the design distribution.
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Mark B. Ledenbach's vintage Halloween collectibles blog.