Vintage RAYTHEON models UM-2186, UM-2187, UM-2188 and UM-2189 (Ch. 21T32) 17 tube TV television receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list and description. 16 pages. Dated 1956. Raytheon Television and Radio Corp., of Chicago, IL. This manual would make a sensational accompaniment to your classic video TV equipment.