Vintage EMERSON models 501, 502, 504 and 520 (Chassis 120.000 and 120.029) Superheterodyne 5 tube AM radio receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test charts, repair parts list and description. Dated 1946. 4 pages. Emerson Radio and Phonograph Corp., of New York, NY. This manual would make a sensational accompaniment to your classic retro radio equipment.