Vintage FIRESTONE AIRCHIEF model 4-A-61 (Code # 332-8-137J2T) 5 tube Superheterodyne AM radio receiver.  Original old Sams Photofact manual includes schematic, layouts, alignment adjustments, repair parts list. 4 pages. Dated 1948.  Firestone Tire and Rubber Company of Akron, OH.  This manual would make a sensational accompaniment to your vintage audio equipment.