Vintage STEWART WARNER models 9170-B, 9170-C and 9170-D 4 tube Superheterodyne AM radio receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list. 4 pages. Dated 1954. Stewart-Warner Corp.  of Chicago, IL. This manual would make a sensational accompaniment to your classic radio equipment.