China

Infos der Auktion

Chinese name: Pocket Calculator(袖珍计算器).

Manufacturer: Shanghai Sci Tech Manufacturing Co., Ltd.

Production period: 1930s-1940s.

Machine size: 130mmX77mm.

Machine weight: 175g.

The history of Chinese people using abacuses dates back to ancient times, and the abacus truly exited the historical stage on a large scale in the 1990s.

The addition machine widely used in Europe and America is rarely used in China. However, the Chinese once produced a sophisticated addition machine - a pocket calculator.

The cleverness of this addition machine lies in: 1. There is a commonly used unit conversion table on the back. 2. The needle is hidden at the bottom of the machine. 3. The reset device is linked to the needle setting door. This design is more clever than the addition machines widely used in Europe and America.