Vintage ARVIN models 241P, 244P and  2410P (Ch. RE-244, RE-254, RE-255, RE-256, RE-259). portable Superheterodyne AM radio receiver. Original old Sams Photofact manual includes schematic, layouts, alignment adjustments, repair parts list. 4 pages. Dated  1948.  Noblitt-Sparks Industries of Columbus, IN. This manual would make a sensational accompaniment to your vintage audio equipment.