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This calculator is from the middle of the period of the "Cold War" before the fall of the Berlin wall and the reunification of Eastern and Western Germany.
During the decades of separation between communist eastern Europe and the west, development of components often took different paths, as shown by the rechargeable cells which look very strange to us in
the west.
The communist coutries lagged behind in chip technology, and so a Texas Instruments calculator chip has been used, which were relatively cheap by this time.
The binding of the wiring with cord is not something that was cost effective in a capitalist economy, but this feature of high-quality industrial wiring has been used in this product of a command economy.
The use of a docking unit seems a very logical and neat idea, yet they were very rarely used. The Advance 88 is another example, but the docking unit is much cruder.
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