Issue: October 1969
Jean Bell was the second black Playmate, but the first black woman to appear on the cover of the magazine, which she did in January 1970. It was the annual Playmate Review issue, and Jean was one of five Playmates on the cover.
(The first black model to get her own cover was Darine Stern. In the iconic shot, Darine was sitting on a Playboy Rabbit-head chair. Darine was never a Playmate, though.)
Jean dated Richard Burton for a time and had a fairly good acting career for a Playmate, starring in the blaxploitation flick T.N.T. Jackson (1974).