Vintage Radio Service Manual -  MIDWEST Model S-12, ST-12 and SG-12. (Chassis SGT-12) 5-band, 12 tubes, AM SW radio with phonograph player combination. Manufactured by Midwest Radio Corp., of Cincinnati, OH. Dated 1947. 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.