Howard Green Duff (November 24, 1913 – July 8, 1990)

The radio series The Adventures of Sam Spade, Detective was 
created by writer Dashiell Hammett for The Maltese Falcon. The
show ran for 13 episodes on ABC in 1946, for 157 episodes on
CBS in 1946-1949, and finally for 51 episodes on NBC in 1949-
1951. The series starred Howard Duff (and later, Steve Dunne)
as Sam Spade and Lurene Tuttle as his secretary Effie, and took
a considerably more tongue-in-cheek approach to the character
than the novel or movie. The announcer was Dick Joy (below).

Dick Joy
(December 28, 1915 – October 31, 1991)