Debut of Byron Foulger.
The DVD cover-box photo on this page has a cropped still (showing Frankie Darro and Frank Conglan Jr.) that is not from "The Devil Diamond", but from a later Monogram film starring Frankie Darro. Frank Coglan Jr. is not in "The Devil Diamond" but accuracy is not always a rule among DVD distributors.
This film is one of over 200 titles in the list of independent feature films made available for television presentation by Advance Television Pictures announced in Motion Picture Herald 4 April 1942. At this time, television broadcasting was in its infancy, almost totally curtailed by the advent of World War II, and would not continue to develop until 1945-1946. Because of poor documentation (feature films were often not identified by title in conventional sources) no record has yet been found of its initial television broadcast. It's earliest documented telecasts took place in New York City Thursday 7 October 1948 on WATV (Channel 13) and in Los Angeles Tuesday 18 April 1950 on KECA (Channel 7).