Comics, The Amazing Spider-Man Bronze Age Group. Marvel. 1974-75. This group includes issues #142-147. Mysterio (Danny Berkhart) appearance. John Romita Sr. cover (#142). First appearance of Cyclon (#143). Gwen Stacy clone appearance (#144). Scorpion and Gwen Stacy clone appearances (#145). Scorpion, Jackal, and Gwen Stacy clone appearances (#146). Spider-Man finds out that Gwen Stacy is really a clone. Jackal and Tarantula appearances (#147). [6]