Green Lantern #7 (1961)

In the year 3042 a scientist named Raakj is turned down for an important position he'd been hoping to get because his methods are too uncontrolled. Raakj sees a historical film and hits on the idea of going back in time and betting on sporting events and suchlike to make his fortune with the knowledge he has of events from the future, so he and his sweetheart can have a comfortable life after missing out on his dream promotion. Raakj builds a time machine but within minutes of traveling back to the 40's, he's hit by a car and taken to a hospital by Green Lantern. Fearing the hero's interference in his plan, Raakj flees the hospital as quickly as he can. He makes a fortune with his gambling plan, but is kidnapped by Nutsy Hagan, a gangster obsessed with eating walnuts. Hagan forces Raakj to use his foreknowledge to gamble on his behalf, and the headlines from Hagan's run of luck catch Green Lantern's attention. Hagan's underlings knock Green Lantern out with a wooden chair, but Raakj turns on Hagan and reveals his true story to the prisoners, before leaving them to suffocate from a poison gas pellet. Green Lantern manages to cut his ropes and break a window to let in fresh air, but by then Raakj is gone. The man from the future is also furious as he realizes that the money he's made will be worthless when he travels back to his own time.

Raakj decides, instead of printed currency from a bygone age, what he could do is find something more timeless like a supply of a valuable element like radium. To find it somewhere no-one else can go, he decides to look on the moon. Meanwhile Alan Scott's discharged from the army: his training with radio makes him far more valuable there than as just another soldier. Doiby feigns weakness to be discharged to so he isn't split up from his partner. Word reaches Nutsy Hagan that Raakj has been working on a dirigible, and Doiby eavesdrops and passes the gang's plan to kill Raakj for betraying them on to Green Lantern. What both groups find out is Raakj wasn't building a dirigible, but a rocketship, and flies to the moon with all of them along for the ride. Raakj drills down into a crater that turns out to hide an underground city inhabited by "Selenites" who are being attacked by ape-people who ride huge birds. Green Lantern fends them off and the group's greeted by the peaceful Selenites. The ape-men kidnap the king's son and Doiby, and Green Lantern goes after them. However it's been more than twenty-hours since he charged the ring and he becomes easy prey for capture himself.

Green Lantern fights in an arena against alien monsters but manages to capture the ape-man king and force him to release the prisoners and show GL where their bird-steeds are kept. The king attacks the Selenites' city in a giant robot, but Green Lantern scales it and manages to knock the king from the cockpit in its head then controls the robot into destroying itself. A peace treaty's negotiated between the two settlements when it turns out all the ape-men wanted was access to more water. As a reward for his service the king of the Selenites rewards Green Lantern with a hypnotic moonstone, which Raakj steals uses to force Green Lantern to reveal the ring's source of power. Raakj tries to escape the moon with both power items, but the Selenites combine their telepathic powers to try to compel Raakj to bring them back.