Bag with 2.5x4" header card contains 3.5" dia. button by Button World Manufacturing Inc. of Brooklyn, NY. ©1966 Marvel Comic Group. Button is second, revised version showing full-body image of the Sub-Mariner swimming. Marvel Comics was not pleased with original design and had button re-designed. Rim reads "Official Member Super Hero Club." Several other buttons were revised including Daredevil, Spider-Man and Thor. Header card has some light wear to edges/corners and is lightly aged. VF with N. Mint button as bagged. "The Full-Color Guide To Marvel Silver Age Collectibles" book lists value for this button at $300-$400 in bag. All revised buttons are rare. From the James Gallo Collection.