Notes:
First B'wana Beast. In Amazing World of DC Comics #10 (January 1976), in the article "There's No Cases Like Showcases", Jack C. Harris notes, "George Kashdan made his SHOWCASE editorial debut and farewell with a two-issue origin of Mike Sekowsky's jungle hero B'wana Beast in #66 (Jan./Feb. 1967) and #67 (Mar./Apr. 1967). Only a third-rate Tarzan, Mike Maxwell's alter-ego was lost on the newsstands."
On-sale date from ad in Sea Devils #33 and copyright registration.