DATAMATH CALCULATOR MUSEUM
side of the Western Auto electronic Wizard with
a confusing model number: TXI 4993A47.
of the Western Auto electronic Wizard aka M4993 (top) shows
the changed mold for the display frame compared to the Exactra line.
name plate of the Western Auto electronic Wizard.
|The Western Auto electronic Wizard
unknown display construction.
|This Exactra 23 uses a LED display
Bowmar, better known as Opto-Stick.
|The printed circuit board (PCB)
of the M4993
with the TMS0803 single-chip calculator circuit and
one additional display driver plus transistors.
|The printed circuit board of the Exactra 23
is 100% identical with the Western Auto
electronic Wizard aka M4993.
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© Joerg Woerner, March 5, 2006. No reprints without written permission.