Iron Man, Vol. 1 #61A (1973)

Death Knells Over Detroit
Captured by the Masked Marauder, Iron Man lets his suit recharge while hearing about the villain's plan to use the stolen spacecraft to blackmail the city of Detroit. Eventually breaking free and fighting his way through Steele and the Marauder before defusing the spacecraft's bomb, Iron Man is able to prevent the blackmail threat from succeeding. Meanwhile, Happy isn't too pleased with the amount of time Pepper has spent out of town, and misinterprets a newspaper photo showing Pepper and Tony together at a restaurant. Unable to reach Pepper, who was searching for Tony Stark to relay the Marauder's threat, Happy decides he can take no more and breaks up with Pepper via telegram.
Release Date: 1973