Vintage DELCO models R1230A,  R1231A and R1232A 5 tube Superheterodyne AM radio receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test charts, repair parts list and description. 4 pages. Dated 1947. Delco Radio, Div of G.M. Corp., of Kokomo, IN. This manual would make a sensational accompaniment to your classic retro radio equipment.