Original Yankee Stadium seat back signed in black Sharpie by four former New York Yankees World Series MVPs: Yogi Berra, Whitey Ford, Bob Turley, and John Wetteland. All the signatures are boldly scripted and grade 9/10 or better. This plastic seat back was installed during the mid-1970s renovations and removed following the 2008 season. Excellent condition overall, with wear commensurate with its former use. Accompanied by a COA from PSA.