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Additional Pictures 

 

The sleek shape of the original Checkmate.

The sleek shape of the Checkmate 1002.

The dismantled Checkmate with the Litronix display
modules, discrete display drivers and an early
Litronix LIT-019 calculator circuit.

The dismantled Checkmate 1002 with the Litronix display
modules, an unusual display-driver and a unknown
calculator circuit.

Three display modules with the 7-segment LED displays and
small plastic magnification lenses manufactured by Litronix.

The label on the backside of the Checkmate explains
the 12 digits calculating capacity.

 


horizontal rule

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

Joerg Woerner, October 24, 2002. No reprints without written permission.