Amazing Spider-Man Vol.1 #87
Peter Parker reveals to Gwen, Mary Jane, Harry Osborn, and Captain Stacy that he is Spider-Man; they all assumed Peter was impersonating Spider-Man, but Gwen says that he really could be Spider-Man; Hobie Brown (aka the Prowler) dresses up like Spider-Man.
Printed: Aug 1970
Writers: Stan Lee
Art: John Romita Sr. and Jim Mooney
Cover: John Romita Sr.