Re: ROBOT retro full size Professor Stears
The image is from the first issue of MAGNUS, Robot Fighter -4000A.D, first published by Gold Key comics in 1963 by Russ Manning. Manning created the character as a "Tarzan of the future". The common trraits the characters share are they were raised by beings of their environment and had well developed skills. Tarzan being raised by an ape, and having the skills of jungle life, Magnus by a self-aware robot and trained to fight and destroy rogue robots with his bare hands. I've always thought of the character as the ultimate "man vs. machine" senario.
If your interested, Dark Horse has republished the original stories in a few volumes of books. Mannings artwork is terrific. Check 'em out.