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Additional Pictures 

 

The back side of the Western Auto electronic Wizard with
a confusing model number: TXI 4993A47.

The side view of the Western Auto electronic Wizard aka M4993 (top) shows
the changed mold for the display frame compared to the Exactra line.

The "woody" name plate of the Western Auto electronic Wizard.

The Western Auto electronic Wizard with an
unknown display construction.

This Exactra 23 uses a LED display manufactured by
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.


horizontal rule

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

Joerg Woerner, March 5, 2006. No reprints without written permission.