Sharp calculator manufactured from 1889 to 1991, model Pa-371. Happily, it's working perfectly. It also comes with the original case featuring the Sharp logo. This calculator belongs to the "electronic kana memo" genre of the time, and has historical value as a document illustrating the evolution of Japanese input methods. It's a valuable item that can be described as a "portable information terminal of the late Showa era." Enjoy the "Showa-era business tools" like company names and fax numbers. F