Vintage Radio Service Manual - AIRLINE model 74BR-1812B 9-tube Superheterdyne AM FM radio receiver. Manufactured by Montgomery Ward & Company of Chicago, IL. 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.