DATAMATH CALCULATOR MUSEUM
shape of the original Checkmate.
shape of the Checkmate 1002.
Checkmate with the Litronix display
modules, discrete display drivers and an early
Litronix LIT-019 calculator circuit.
Checkmate 1002 with the Litronix display
modules, an unusual display-driver and a unknown
modules with the 7-segment LED displays and
small plastic magnification lenses manufactured by Litronix.
on the backside of the Checkmate explains
the 12 digits calculating capacity.
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© Joerg Woerner, October 24, 2002. No reprints without written permission.