Vintage Radio Service Manual - SENTINEL model L-284I L-284NA L-284NI  L-284NR & L-284W 5-tube Superheterdyne AM radio receiver. Manufactured by Sentinel Radio Corp., of Evanston, IL. 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.