DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Additional Pictures
The printed circuit board
(PCB) of a Royal Model 91K (UA122) calculator manufactured in
September 1975 with its (mirrored) backside. |
The Keyboard
Module of a Royal Model 91K (UA122) calculator manufactured in
September 1975 with its (mirrored) backside. |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, January 25, 2025. No reprints without written permission.