Buster Crabbe (of Flash Gordon fame), shucking out of his swimsuit. Like many other men in today's post, there's a tribute to him elsewhere in the Underworld that you can get to by clicking on his name.
John Derek's chest in this still photo from 1951's Saturday's Hero, but there's plenty of him on his tribute page (and likely more to come when I do a tribute to The Ten Commandments!)
Miss Robin Crusoe, which starred George Nader. Here he is cocking his rifle while sporting his cute little blue loincloth from the 1954 film. (Foot fetishists might enjoy this particular pose, too!)
Jorge Rivero had not only a great chest, but a great EVERYTHING! He appealingly played Adam in The Sin of Adam and Eve (1969) before progressing to a semi-successful career as a supporting player in Hollywood films.
Robert Conrad, the super-fit movie actor who made a successful home for himself on the small screen.
Hugh O'Brian was a guest in the pilot for The Virginian in 1962 and showed his chest. I know it looks a little bit flabby around the waistline in these action shots of him digging a post hole, but he would soon get into even greater shape for 1965's Love has Many Faces.
Lee Majors of The Six Million Dollar Man. Majors (seen here with The Bionic Woman Lindsay Wagner) was always finding reasons to go shirtless.
Then again, it was a different era. Chest hair was in as was showing it off with plunging necklines and the absence of t-shirts underneath tops and/or workout wear such as this.
Dallas was in great shape for most of the run of that stalwart series.
Jon-Erik Hexum. He was a gorgeous model...
Burt Reynolds in 1974's The Longest Yard.
Sam Elliott in 1976's Lifeguard.
Jim Brown in his Playgirl layout.