Details:

It needs two batteries type SR44  

Usage:

As usual today

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Serial number:

Build in:

Functions:

Market-introduction:

Production until:

Price:

1727906

Ca. 1980

Multi function device including: basic calculation, clock/calender, schedule and alarm

1980 (source: Büromaschinen Lexikon)

1982?

Similar calculators were priced between DM40 and DM50