DATAMATH  CALCULATOR  MUSEUM

Additional Pictures 

 

The calculator circuit was manufactured in the 5th week of 1974 
by Western Digital and featured already a 4-key memory.

The printed circuit board of the Montgomery Ward TXI-8646A
looks different to our expectation - a calculator circuit in a 
40-pin housing. Please notice the small number near the
display: 13-04-709-478.


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

© Joerg Woerner, September 20, 2002. No reprints without written permission.