Vtg HP-67 Hewlett Packard Programmable Calculator Magnetic Cards Manuals Box

Vintage Hewlett-Packard HP-67 Programmable Scientific Calculator with Original Box, Manuals, Magnetic Cards & AccessoriesOffered is a vintage Hewlett-Packard HP-67 programmable scientific calculator with original box, AC adapter/charger, battery pack, extensive documentation, magnetic program cards and additional accessories/materials shown in the photographs. Introduced in 1976, the HP-67 was Hewlett-Packard's advanced magnetic-card programmable handheld calculator designed for engineers, scientists and other technical professionals. TESTING & FUNCTIONALITYThe calculator has been tested using the included HP AC adapter/charger. The following functions were individually tested and operated correctly:  Calculator powers on from the included AC adapter  LED display illuminates brightly and is clearly legible  Numerical keypad/input  Addition  Multiplication  Division  Square-root scientific function  The photographs include the calculator powered on during testing. Battery: The included battery pack was stored outside the calculator. It appears clean with no visible leakage. The battery was installed and given a brief approximately 5-minute charge for testing, but did not subsequently power the calculator independently. Battery capacity has not been further tested and the battery should be considered untested beyond this brief test / likely in need of rebuilding or replacement due to age. Magnetic card reader: An unmarked magnetic card was inserted in an attempt to test the ca