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Additional Pictures 

 

The printed circuit board (PCB) of a MBO de Luxe III (Version 1) calculator manufactured in May 1975 with its (mirrored) backside.

The Display PCB of a MBO de Luxe III (Version 1) calculator manufactured in May 1975 with its (mirrored) backside.

The Keyboard Module of a MBO de Luxe III (Version 1) calculator manufactured in May 1975 with its (mirrored) backside.


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

© Joerg Woerner, March 5, 2025. No reprints without written permission.