Vintage SEARS SILVERTONE model 7300 (Ch. 435.240) Inter-com system. Original old Sams Photofact manual includes schematics, layouts, voltage & resistance charts, repair parts list. 2 pages. Dated 1948. Sears, Roebuck & Company of Chicago, IL. Sears, Roebuck & Company of Chicago, IL. This manual would make a sensational accompaniment to your vintage audio equipment.