This one really should have been the blockbuster that Stan Lee and Martin Goodman feared that Harvey was going to produce with Joe Simon heading up their attempt to jump onto the super hero bandwagon in 1966. Spyman was the brainchild of future Marvel superstar Jim Steranko. But apart from the odd spot illustration (such as the diagram of Spyman’s electro-robot hand on this cover) Simon wouldn’t let him draw the strip, and so it became mired in mundanity and never took off. Given Steranko’s eventual success on the similar Nick Fury, Agent of SHIELD strip, it’s easy to see just what Spyman might have become.
The Grand Comics Database credits the writing on this issue to Jim Steranko, but I don’t know how much of it may have been reworked along the way by Joe Simon. The main artist on this story was George Tuska, and the GCD suggests several inkers, including Mike Esposito, Carl Pfeufer and Tuska himself.