Vintage SENTINEL models 1U-1101, 1U-1111, 1U-1121, 1U-1124, 1U-1126, 1U-1127, 1U-1131, 1U-1134, 1U-1136, 1U-1137, 1U-1145, 1U-1155, 1U-1157, 21101, 21121 and 21145 TV television receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list and description. 18 pages. Dated 1956. Sentinel Radio Corp., of Evanston, IL. This manual would make a sensational accompaniment to your classic video TV equipment.