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Additional Pictures 

 

The DCM-50A Platform with the CT5001 single-chip calculator circuit from a Unitrex 1200 (Type 27, Rev. 4C) manufactured in April 1972.

Close-up view of the Mostek CT5001 single-chip calculator circuit.



Close-up view of the view of the USHIO U-BR-12400ES Planar Neon Gas Discharge Display (Panaplex-style).




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

© Joerg Woerner, April 5, 2026. No reprints without written permission.