Amazing Spiderman 31 CGC 4.0 from 1965. SOLD! First Gwen Stacy! Cover by Steve Ditko. First appearances of Gwen Stacy, Harry Osborn, and Professor Warren. First appearance of the Master Planner (revealed in issue 32 to be Doctor Octopus) in "If This Be My Destiny, script by Steve Ditko (plot) and Stan Lee (script), art by Steve Ditko; Aunt May falls deathly ill on Peter's first day of college. Meanwhile, the Master Planner is stealing scientific gadgets. https://facebook.com/theembassycollection