Sharp - Calculator - 1970-1980 - EL-429 Abacus

EL-429 abacus calculator from Sharp is a two-in-one multi-functional calculating tool, combining the functions of a traditional abacus and an electronic calculator.

The upper part of the device is a 13-section Japanese abacus, and the lower part is a solar-powered electronic calculator, enabling both traditional mental arithmetic and modern electronic calculation. It is a representative product from the early days of widespread adoption of electronic computing technology. This product shows signs of use, but the abacus structure is intact.