Colex ESR

The Colex ESR is a scientific calculator with 8 digits precision and algebraic logic. It has 18 functions, 25 keys, and a VFD (vacuum fluorescent) display.

Facts at a glance:

Feature Value
Type: Scientific
Functions: 18
Keys: 25
Precision: 8
Logic: Algebraic
Display type: VFD
Year introduced: 1975

See other calculators by Colex