This is a set of the Texas Instruments TI-59 (TI Programmable 59) and PC-100C, believed to have been sold around January 1980. It's a programmable scientific calculator with an LED display and the ability to save data using magnetic cards, and it reportedly cost 110,000 yen for the set at the time. ・TI-59 (TI Programmable 59) This item has been cleaned internally, the cable has been replaced (where deteriorated), and simple calculations have been performed to confirm that the display and operation are working correctly. However, the magnetic card reader's normal operation could not be confirmed. (Writing to magnetic cards was possible.) Also, as I do not have an AC adapter, I cannot confirm whether there are any issues with power supply from an AC adapter. ・PC-100C The following defects exist, and it does not function as a printer: 1. Paper feed does not work properly. 2. The thermal paper set is deteriorated and the printing is unreadable. 3. The printed content is garbled and unreadable. The charging terminals have been renewed, and the calculator and rechargeable battery can be powered without problems, so please use it as a charger. When attaching the calculator, press it against the printer's terminals and turn the key to ON to lock it. Conversely, turning the key and pulling the calculator towards you will unlock it. 【Included Items】 ・Rechargeable battery (replaced with a new one and usable) ・Magnetic card x 1 ・Key Code Overlay ・MASTER LIBRARY MODULE ・Thermal paper ・Key for attaching the calculator ・Printer terminal protection cover When not in use, please remove the rechargeable battery from the printer. Charging will occur even when the printer is turned off. There is no indication to show when charging is complete, so remove the rechargeable battery from the printer after about 5 hours of charging. ※Due to the age of the item, the operation after shipping cannot be guaranteed. ※The ruler shown in the photo is not included.