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.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, October 24, 2002. No reprints without written permission.