The Invincible Iron Man #58 (1973)

"Mandarin and the Unicorn: Double-Death!" Story by Steve Gerber and Mike Friedrich. Art by George Tuska, Frank Giacoia, and Mike Esposito. The Mandarin and the Unicorn join forces to fight Iron Man! Shell-head is defeated in round one as his chestplate is severely damaged. After realizing that his once weak heart has now healed, Tony repairs his armor and sets out to find the deadly duo. Will Shell-Head win round two?

Good condition.