This is one of the few true "decoders" ever offered as a radio premium. A code uses something (letter groups or image) to represent a word or phrase. Most "decoders" (Captain Midnight, Radio Orphan Annie, etc,) are really cipher devices. The Six-Gun Decoder has a rotatable representation of a revolver on its front. The barrel can be pointed at any of the small icons around the badge. A coupled pointer on the back indicates what each icon represents.