Wham-O Mfg.—14 Mold—6th Style—U.S.National GutsMaker: Wham-O Mfg. Model: Professional Frisbee Style: 6th Mold: 14 Size: 9.375 inches Disc Color: Fire Orange Lettering/Hot Stamp: 2 White Bands, "Professional Frisbee®, Laurel Leaves™" Label/Sticker: Blue on White "U.S. National Guts Frisbee Tournament, Cliffs Ridge Ski Area & Frisbee Sanctuary", Guts Player throwing a thumber. Date Introduced: August 13-14, 1977 Number Produced: Period of Manufacture: 1977 Special Notes: Contributor(s): Joe Essman