Vintage CBS-COLUMBIA models 515A, 516A and 517A 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 1953. CBS-Columbia, INC. of Long Island City, NY. This manual would make a sensational accompaniment to your classic radio equipment.