Description:Lefty Grove 1926-29 Exhibit postcard autographed by Mickey Cochrane (PSA/DNA 8 NM-MT). Lefty Grove Exhibit postcard signed on the back by Mickey Cochrane. Black fountain pen signature rates 8 out of 10. Card itself shows moderate wear including a few small creases. Encapsulated by PSA/DNA (8 NM-MT) and includes letter of provenance from the family: Card: GD-VG