Details:

According to https://world.casio.com/corporate/history  the 152 was released in May 1968 and was Casio’s  first integrated circuit calculator.

It is equiped with 15 Nixie tubes. Results of multiplications or divisions can be added in two independent registers.  

It facilitates floating as well as fixed point calculations.

Usage:

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Serial number:

Built in:

Functions:

Power:

Market-introduction:

Production until:

Price:

300005

Probably  1968

Addition, Subtraction,  Multiplication,  Division

220V

1968

1969   (It only appears in the 1968/1969 edition of Büromaschinen Lexikon)

DM 4800,- in 1968 (Source: Büromaschinen Lexikon)