Vintage RCA VICTOR models 4-C-531, 4-C-532, 4-C-533, 4-C-534 and 4-C-535 (Ch. RC1144) 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. 3 pages. Dated 1954. This manual would make a sensational accompaniment to your classic radio equipment.