Vintage Radio Service Manual - WOOLROC model 3-17A & 3-18A 5-tube Superheterodyne AM radio receiver. Manufactured by Phillips Petroleum Corp., of Bartlesville, OK. Dated 1948. 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.