One of just three signed 1940 Play Ball cards of Bob Klinger graded by PSA/DNA, this example is a MINT 9 signature applied to a card graded PSA VG+ 3.5.  Klinger died in 1977, likely the reason for the low population of signed cards. The card originates from the Shibe Park collection of autographed cards, an original owner collection carefully collected by a teenage boy who, in 1939 and 1940, obtained many autographs from players arriving at the train station near Shibe Park, and continued for many years to obtain signatures in person and through the mail.