Vintage ZENITH models Y513F, Y513G, Y513R and Y513W (Ch. 5Y01) 5 tube Superheterodyne AM radio receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list and description. 4 pages. Dated 1956. This manual would make a sensational accompaniment to your classic radio equipment.