Vintage MOTOROLA models 52R11A,  52R12A, 52R13A, 52R14A, 52R15A and 52R16A (Ch. HS-317) 5 tube Superheterodyne AM radio receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list. 4 pages. Dated 1952. This manual would make a sensational accompaniment to your classic radio equipment.