Superman

The Pep Comic Buttons were packed inside specially marked boxes of Kellogg's® Pep® in 1945, 1946 and 1947. There were five different sets to collect, with each set consisting of 18 buttons. The complete assortment of pins is shown below:
Set #2 - Offered in 1946
Olive Oyl, Little King, Hans, Blondie, Uncle Willie, Rip Winkle, Fritz, Lord Plushbottom, Junior Tracy, Don Winslow, Emmy, Popeye, Pop Jenks, Maggie, Dagwood, Jiggs, Andy Gump, Superman