Extraordinary high-grade 1960 Pittsburgh Pirates World Champions team-signed baseball featuring 25 signatures, including Roberto Clemente. Graded NM-MT 8 by PSA (signatures grade MINT 9; ball grades NM 7; resulting in an overall grade of NM-MT 8). This is the finest 1960s team ball we have ever handled and one would be hard pressed to find another in higher grade. The Official National League (Giles) baseball has been signed in blue ink by the following twenty-five members of the 1960 World Champion Pittsburgh Pirates: Clemente, Mazeroski, Giel, Haddix, Skinner, Burwell (coach), Friend, Christopher, Law, Green, Umbricht, Face, Oldis, Nelson, Smith, Vernon, Daniels, Schofield, Hoak, Oceak (coach), Virdon, Groat, Bend Mizell, and Gibbon. (The signature of manager Danny Murtaugh on the sweet spot has been deemed a clubhouse example by PSA; common for all Pirates balls from this era.). This is an exceptional high-grade example and one that would be a welcome addition to any advanced Pittsburgh Pirates, Roberto Clemente, or team-signed ball collection. Full LOA from PSA.