The circa-1930 Cracker Jack Pin (PR4) set consists of 25 players issued by Button Gum, but later attributed to the popcorn and peanut company after they were inserted into the Cracker Jack products. Each pin measures 13/16” in diameter depicting a painted player portrait, printed in blue, gray, yellow and flesh-tone. The set is unnumbered and each player name is printed under each image in blue. The reverse reveals no advertisement and tends to show wear and rust amidst the medal backing. Key players in the PR4 Cracker Jack Pin set include Hall of Famers Kiki Cuyler, Dizzy Dean, Frankie Frisch, Lou Gehrig, Lefty Gomez, Lefty Grove, Tony Lazzeri, Charles “Red” Ruffing and Paul Waner, among others.