Keystone 88

The Keystone 88 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 18 keys, and a gas discharge display. The power source is 4xAA.

Facts at a glance:

Feature Value
Type: Arithmetic
Functions: 5
Keys: 18
Precision: 8
Logic: Algebraic
Display type: Discharge
Length: 133mm
Width: 81mm
Power Source: 4xAA
Year introduced: 1974

See other calculators by Keystone