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Additional Pictures 

 

The DCM-50A Platform with the MK6010L single-chip calculator circuit from a Busicom "HANDY-LE" LE-120S manufactured in March 1972.
Close-up view of the Mostek MK6010L single-chip calculator circuit.

Close-up view of the view of the QP-3731 Display-PCB with 12 Monsanto MAN-3A Seven-Segment LED Displays and the two indicator LEDs.


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

© Joerg Woerner, March 22, 2026. No reprints without written permission.