I think the set of four, of which this is one, is unusual, calming and extremely hard to find in collectible condition. Even with the flaws the seller so carefully called out, this fetched a pretty penny! I feel the flaws were overshadowed by the still-bright colors. I had read another listing for an item from this set that claimed the set was produced by Dennison. Although that is surely possible, I can find no evidence that this set was produced by Dennison. Stylistically, it doesn’t seem to fit, either.
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Mark B. Ledenbach's vintage Halloween collectibles blog.