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Additional Pictures 

 

The sales box of the Royal CBC 80 Checkbook Calculator sold around 1988 in the US.



The Royal CBC 80 Checkbook Calculator in its sleeve with holder for a checkbook, credit cards and pen.

This Royal CBC 80 Checkbook Calculator was manufactured in March 1988 in Thailand.

The printed circuit boards (PCBs) of the Royal CBC 80 manufactured in March 1988 doesn't reveal type and manufacturer of its
single-chip calculator circuit but we are almost positive to spot a Toshiba T7752S. Compare a PCB from 1989.


Close-up view of the Toshiba T7752S single-chip calculator circuit.

Close-up view of the PCB-Marks of two CBC 80.




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If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, February 13, 2020. No reprints without written permission.