Vintage ZENITH models X2636E, X2636EU, X2636R, X2636RU, X2670E, X2670EU, X2670R, X2670RU, Y2636EUZ, Y2636EZ, Y2636RUZ, Y2636RZ, Y2670EUZ, Y2670EZ, Y2670RUZ and Y2670RZ (Ch. 17X23) 17 tube TV television receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list and description. 20 pages. Dated 1956.