Amazing Spider-Man Vol.1 #75
Spidey, aware that Dr. Connors and his family are in danger from the Maggia, searches for them; The once-elderly Silvermane tries to convince Marko and Cicero that he is in fact a younger version of himself while Dr. Connors escapes and Spider-Man arrives; In the ensuing free-for-all Connors transforms into the Lizard…and Silvermane just keeps getting younger.
Printed: Aug 1969
Writers: Stan Lee and John Romita Sr.
Art: John Romita Sr. and Jim Mooney
Cover: John Romita Sr.