Vintage CBS-COLUMBIA models C220, C230, C231, C232 and C240 (Ch. 616, 636 and 656) 5 tube Superheterodyne AM radio receiver with electric clock. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list and description. 4 pages. Dated 1956. This manual would make a sensational accompaniment to your classic radio equipment.