The Avengers #66 [Regular Edition] - Vf- 7.5

First 15 cent issue. "Betrayal!" Part 1 of 3. First appearance and use of adamantium. Script by Roy Thomas. Pencils by Barry Windsor-Smith. Inks by Syd Shores. Cover by John Buscema and Sam Grainger. Onboard the SHIELD Helicarrier, Earth's Mightiest Heroes test a new metal alloy called adamantium! The metal is so strong that even Thor's hammer cannot fracture it! Wow, what would happen if this awesome alloy fell into the wrong hands? Regrettably the Avengers don't have to wait long for the answer as the Vision steals the adamantium and then ambushes his fellow avengers inside the mansion! What a shocking development! Could things get any worse? Perhaps only if the Vision's robotic creator were to suddenly appear!