Gorgeous "Cleveland" variation of Roger Peckinpaugh's 1926-29 Exhibits Postcard Back, signed in heavy black fountain pen by the popular shortstop.  With an appearance of roughly EX, the signature has been graded MINT 9 by SGC's now-discontinued autograph division.   Some small ink writing and light paper loss on the reverse reduces the actual technical grade.  A difficult and desirable early autographed card.