Vintage TELESONIC model 1642 (Medco) 5 tube Superheterodyne AM radio receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test charts, repair parts list and description. 4 pages. Dated 1947. Telesonic Corp. of America, of New York, NY. This manual would make a sensational accompaniment to your classic retro radio equipment.