Amazing Spiderman Vol 1 Issue 20 CGC 5.5

A report comes across J. Jonah Jameson's desk, describing the research of Farley Stillwell. Dr. Stillwell has found a way to force mutations. Jameson brings along a willing accomplice to create the Scorpion, a character capable of defeating Spider-Man. Unfortunately, Mac Gargan's sense of right and wrong is skewed by the process, and he becomes an uncontrollable villain.

Cover art by Steve Ditko. First appearance of the Scorpion in The Coming of the Scorpion!, script by Stan Lee, art by Steve Ditko; J. Jonah Jameson pays Dr. Stillwell to turn Mac Gargan into the Scorpion to try to capture Spider-Man. Stillwell's formula makes Gargan become more evil than he originally was and the Scorpion goes on a rampage and is finally stopped by Spider-Man. 

Picture of actual comic book in protective film cover