Pair of New York Yankees team baseballs, each from a different World Championship season. 1) 1961 New York Yankees. Twenty-five blue-ink signatures (averaging 7/10) on a Spalding "Yankees" souvenir ball, including Berra (sweet spot), Ford, Lopez, Downing, Tresh, Boyer, Turley, Coates, Richardson, Kubek, Clevenger, Stafford, Gardner, Hale, Reed, Skowron, Howard, Terry, Arroyo, Sheldon, and Blanchard. (Please Note: the Mantle and Maris signatures on the ball have been deemed clubhouse examples by PSA.) The year, "61," is written on the ball label in blue ink. EX-MT. 2) 1977 New York Yankees. Nineteen black-ink signatures (averaging 6/10) on an Official American League (MacPhail) ball, including Martin (Mgr., sweet spot), Hunter, Berra (coach), Nettles, Randolph, Tidrow, Howard (coach), Boyer (coach), Cox (coach), Blair, Healy, Alston, Howser (coach), Torrez, Figueroa, Chambliss, Zeber, and White. EX-MT. Full LOA from PSA.