Vintage IBM Customer Engineering Reference Cards & Procedures Lot – 1960s

Original IBM Customer Engineering reference materials from the 1960s, consisting of field-issued reference cards, procedures, and service documents used by IBM customer engineers. These documents were intended for internal field use and cover a variety of IBM systems, peripherals, and service procedures. Items are primarily single-sheet or card-format references, typical of what a customer engineer would carry or keep in a service kit. This lot includes: Customer Engineering Parts Activity Report (double-sided) Component Circuits reference card DOS / TOS / OLTEP reference card 1050 Character Reference Chart (dated 1964) IBM 3803-2 / 3420 reference card IBM 2030 I/O Micro Operating Procedure reference card IBM 3800 Printer Subsystem CE reference card 2540 Read Checks / Read Feed preventive maintenance sheet 3215 Printer Adjustment Procedure 1403 Hydraulic Unit Adjusting Tool Instructions Documents show typical age-related wear such as light edge wear, folds, or handling marks consistent with field use. All items appear original and intact. No reproduction copies.