Brother 813SR

The Brother 813SR is an arithmetic calculator with 8 digits precision and algebraic logic. It has 13 functions, 29 keys, and one of the early LCD (liquid crystal) displays which incorporated a yellow filter. The power source is 2xAA. The calculator was manufactured in Japan.

Facts at a glance:

Feature Value
Type: Arithmetic
Functions: 13
Keys: 29
Precision: 8
Logic: Algebraic
Display type: YLCD
Length: 144mm
Width: 77mm
Thickness: 22mm
Weight: 127g
Power Consumption: 0.001W
Power Source: 2xAA
Country: Japan
Year introduced: 1979

See other calculators by Brother