3.5x6" four page folder on glossy paper. Issued in 1940, the same year Gum Inc. produced the classic 72 card set (see shipping carton for the cards #2430). Front has image of Superman above text "Free Prizes For Superman Bubble Gum Club Memberships." Opens to reveal detailed club information inlcuding how prizes could be obtained along w/images of 12 different Superman items. This inlcudes: badge, scrap book, coloring book, cut-out book, boxed puzzle set, peep-show pistol w/Superman filmstrip, Krypto-Raygun, Ideal doll, Marx wind-up tank and airplane, dispatch case, Milton Bradley game. Prizes on the back cover are: sweatshirt, very rare play suit (see item #2074) and play pants. Prizes could be obtained by sending in money & wrappers or free of charge by recruiting new members and using the club applications from the wrappers. Lt. handling wear but bright and clean. Exc. Very rare, only a few examples are known.