Vintage Radio Service Manual - TELECOIN model M5TS4 4-tube Superheterodyne AM radio receiver with automatic coin timer. Manufactured by Telecoin Systems, of New York, NY. Dated 1947. 4 pages. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list and description. This manual would make a sensational accompaniment to your retro audio equipment.