Official American League (MacPhail) baseball sources from a mid-1970s Hall of Fame Induction in Cooperstown and features 20 signatures including: Mantle, Greenberg, Gehringer, Lopez, Averill, Irvin, Terry, Coveleski, L. Waner, Lindstrum, Kaline, Wynn, Leonard, Conlan, Bell, Lemon, Grimes, Roush, Kelly, and Johnson. Signatures average 7/10; ball presents NRMT.