Vintage Radio Service Manual - MOTOROLA model 67XM21 (Chassis No. HS-64) 5-tube Superheterodyne AM FM radio receiver. Manufactured by Motorola, Inc., of Chicago, IL.  Dated 1948. 6 pages.  Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list and description. This manual would make a sensational accompaniment to your retro audio equipment.