Brand: CASIO
Model: LC-825
Type: Calculator
Picture: CASIO LC-825
Batteries: LR44 x 2
Lifetime: Introduced: unknown
Terminated: unknown
Notes: Plain calculator.

Some nice features, the display shows the chosen operator. When an operator is pressed twice, a "K" is shown on the display to indicate constant operation.

Some peculiarities, according to this calculator, √-9 = -3. And the "AC"-key also clears the memory.