I have recently seen comments these may have actually been retail tested. Unconfirmed but intriguing. Still, the lack of examples makes me doubt it was a traditional retail test; maybe just done in a research lab setting for play value analysis. Several known examples do show evidence of being handled and defaced by kids. They appear to have been created in 1963.
It is indeed possible they were printed in Connecticut (Hampden area).
Last edited by toppcat; 08-13-2020 at 02:07 PM.
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