Amazing Spider-Man Vol.1 #74
Silvermane believes that the petrified tablet contains the secret of the Fountain of Youth; He forces Dr. Connor to interpret the tablet and make the serum described therein; Silvermane drinks the untested serum--and it works!
Printed: Jul 1969
Writers: Stan Lee and John Romita Sr.
Art: John Romita Sr. and Jim Mooney
Cover: John Romita Sr.