May 1, 1991, was an unforgettable day in baseball history as Oakland speedster Rickey Henderson rewrote the record book, passing Lou Brock's all-time stolen base record with his 939th when he swiped third in the third inning against the Yankees battery of Tim Leary and Matt Nokes. These certificates were meant to be given out when Rickey eclipsed Brock's standard but wound up stashed away instead. Your gain! The certificates picture Brock and Henderson and are EX-MT to NRMT. Each is signed by Brock in either red or blue felt-tip (8/10).