Navy Blue New York Yankees Baseball Cap, size 7 1/8", signed by Yankee great Mickey Mantle in blue fiber-tip marker on the inside rim of the cap. The cap is accompanied by a letter from JSA (James Spence Authentication), dated October 26, 2005 (certification number B14162). An excerpt from the Letter of Authenticity reads "The signature is consistent considering a wide range of specific qualities including slant, flow, pen pressure, letter size and formation, and other characteristics typical of our extensive database of known exemplars we have examined throughout our hobby and professional careers. It is our considered opinion that the signature item is genuine."