Issue: #350
Last valuation update: 2026-10-20
“THE SECRET OF THE STONE-AGE SUPERMAN!” Superman travels over a million years into the past to uncover the secret of a caveman skeleton in a Superman costume!"The Secret of the Stone-Age Superman!" (Superman and Perry White) written by Otto Binder, penciled and inked by Wayne Boring. Perry White goes spelunking in France and finds a caveman skeleton with Superman's outfit, Superman investigates."C...
Creators: George Klein, Curt Swan, Wayne Boring, Otto Binder, Jim Mooney, Mort Weisinger
Characters: Batman, Superman, Hal Jordan, Green Arrow, Supergirl, Supergirl, Perry White, Dick Malverne, Cap, Katar Hol