I’m glad that boxes of Gibson seals are getting the market attention they deserve. (In fact, a box alone sold for $79!) Gibson was always the also-ran to Dennison in terms of seals - certainly both in artistry and quantity/distribution. Box for box, Gibson seals are much harder to find than Dennison. I began collecting them in earnest 20+ years ago and still only have maybe 30 boxes.
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Mark B. Ledenbach's vintage Halloween collectibles blog.