This is a calculator I've used for a long time. It was probably made in the 1980s. The CASIO JS-20 is a Japanese-made, thin electronic calculator with a standard key layout and battery operation. - Brand: CASIO - Model Name: JS-20 - Function: Electronic Calculator - Country of Manufacture: Japan - Shape: Thin - Key Layout: Standard key layout - Power Source: Battery It works without any problems. There are scratches and stains.