Incredible Hulk #6 is the final issue of the original six-issue Hulk series before the character transitioned to Tales to Astonish. This Silver Age key features the first appearance of the Metal Master and the Teen Brigade, with story by Stan Lee and classic Steve Ditko artwork. This CBCS 3.5 copy is further enhanced by verified signatures from Stan Lee and Dick Ayers, making it an outstanding collectible that combines historical significance, creator autographs, and early Hulk scarcity.