Vintage RCA VICTOR models 54B1, 54BB1-N, 54B2 and 54B3 portable Superheterodyne 4 tube AM radio receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test charts, repair parts list and description. Dated 1946. 4 pages. RCA Victor Div., Radio Corp of America of Camden, NJ. This manual would make a sensational accompaniment to your classic retro radio equipment.