Original vintage EMERSON Television 669b 675b Preliminary Service Notes, which includes alignment, tube locations, and foldout schematic; and the Troubleshooting Manual 669b 675b which chassis no. 120129-b.  Extra notes for model 669b, and several field service bulletins for 688b 689b 690b 692b 693b 694b 697b . The manuals have holes at the left margin to place it in a 3 ring binder, and the Service Note for Models 669B and 675B have an old staple in the corner. They are in VG condition, with the pages clean and intact.  Old 1950-51 factory manuals.  35 pages.