Vintage AUTOMATIC model CM-333 (for 1953 Chevrolet automobiles) 6 tube Superheterodyne AM car radio receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list. 6 pages. Dated 1954. Automatic Radio Corp., of Boston, MA. This manual would make a sensational accompaniment to your classic radio equipment.