Amazing Spider-Man (1963 1st Series) #159 CGC 7.5

"Arm-in-Arm-in-Arm-in-Arm-in-Arm-in-Arm with Doctor Octopus!" Part 3 of 3. Script by Len Wein. Art by Ross Andru (breakdowns) and Mike Esposito (finishes). Cover by Ross Andru and Frank Giacoia (with assists from John Romita).

With his dear aunt's life in jeopardy, the wondrous wall-crawler remembers that the enemy of my enemy is my friend! And in a remarkable twist of fate, the Spectacular Spider-Man and Dr. Otto Octavius team up to take down Hammerhead! The unlikely duo traps Hammerhead inside one of his old nightclubs! And then the final fireworks begin! Spidey and Doc Ock battle Hammerhead to the fateful finish! 

Cover price $0.25.