DATAMATH CALCULATOR MUSEUM
compartment of the Montgomery Ward TXI-8646A
calculator gives access to 4 AA sized alkaline cells.
circuit board (PCB) 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.
The calculator circuit
was manufactured in the 5th week of 1974
by Western Digital and featured already a 4-key memory.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, September 20, 2002. No reprints without written permission.