Details:

It needs two batteries type LR44  

Usage:

As usual today

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Serial number:

Built in:

Functions:

Market-introduction:

Production until:

Price:

1727906

Ca. 1980

Basic calculations, square, square root, percentage, 1/x.  Add and subtract in memory.

1980 (source: Büromaschinen Lexikon)

1982? (After 1981 General is not mentioned anymore on Büromaschinen Lexicon)

Similar calculators were priced between DM40 and DM50