Something a little different- complete set of Kellogg's Pep Cereal pinbacks. Released in three series from 1945-1947 and featuring popular comic book and comic strip characters including Superman and the Phantom. :
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1940's Kelloggs/pep Cereal pep Pins Promotional Store Standee - Etsy
Vintage Lot of 1940s Kelloggs Cereal Collection Pep Pins From Newspaper Comics, Olive Oyl, Daddy Warbucks, Andy Gump - Etsy Denmark
PEP Pin – The Phantom
Vintage Kelloggs Pep Cereal Pinback Button Smokey Stover | eBay
Amazon.com: 1946 - Barney Google Pin Back Button - Kellogg's PEP Cereal Premium - Collectible - Rare : Collectibles & Fine Art