DATAMATH  CALCULATOR  MUSEUM

Additional Pictures 

 

The printed circuit board (PCB) of a Royal Model 90K (UA120) calculator manufactured in November 1975 with its (mirrored) backside.
The Keyboard Module of a Royal Model 90K (UA120) calculator manufactured in November 1975 with its (mirrored) backside.


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© Joerg Woerner, November 30, 2024. No reprints without written permission.