Details:

The Casio FX-68 is a small 8-digit calculator with LCD, a total of 38 scientific functions.  It uses  true algebraic notation including 6-level parenthesis.  

Usage:

 As usual today.

See link to a user manual on the assets page

Click to view a full size picture (opens in a new tab)

Serial number:

Built in:

Functions:

Power:

Market-introduction:

Production until:

Price:

1F106A  ??

Probably 1979

Several mathematical functions.

2 x  G10 (V389)  silver oxide battery

1979

>= 1980   (adverts appear in 1979 and 1980)

Approx. DM 80,-  in 1979.