OAL (Brown) baseball was used in Tom Terrific’s milestone 300th win game in Yankee Stadium on August 4, 1985. Shows excellent use with evenly “rubbed in” stadium dirt. Signed in blue ballpoint by the most Amazin’ Met of all time on the panel: “#300 Tom Seaver, 8-4-85.” Signature grades a “9” out of a possible 10.