Bob Keeshan 1948 NBC official artist pass, as Keeshan began his network TV career on NBC's ''Howdy Doody.'' Front of card has Keeshan's name printed and is signed by NBC President and another official. Verso of card notates the card's privileges, namely, ''...It is an admittance to the NBC premises for the holder only, for rehearsals and broadcasts for which the holder is engaged...'' Signed, ''Robert J. Keeshan'' in bold black ink. Measures 3.75'' x 2.5'' in very good condition.