Vintage BELL SOUND models 3723-MB and 3723-MB3  8 tube audio amplifier with single or 3-speed phonograph record player.  Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list.  6 pages. Dated 1953. Bell Sound Systems, INC., of Columbus, OH. This manual would make a sensational accompaniment to your classic audio equipment.