Vintage Radio Service Manual - AUTOMATIC model 660, 611 & 666  6-tube Superheterdyne AM SW radio receiver. Manufactured by Automatic Radio Manufacturing Company of Boston, MA. Dated 1947. 4 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.