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Additional Pictures 

 

The Royal LCB 841 Checkbook Calculator in its sleeve with holder for a checkbook and pen.

This Royal LCB 841 Checkbook Calculator was manufactured in 1981 in Japan.

The Royal LCB 841 Checkbook Calculator is powered by two LR54 (LR1130) batteries.

The printed circuit board (PCB) of the Royal LCB 841 Checkbook Calculator is centered
around a NEC uPD1833G single-chip calculator circuit.

Close-up view of the NEC uPD1833G single-chip calculator circuit.


horizontal rule

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

Joerg Woerner, February 5, 2020. No reprints without written permission.