Vintage SENTINEL models 1U462, 1U463, 462 and 463 (Ch. 2WA) 21 tube TV television receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list. 20 pages. Dated 1953. Sentinel Radio Corp., of Evanston, IL. This manual would make a sensational accompaniment to your classic video TV equipment.