Additional Pictures 


The leading TXI- designation on the label of the Montogomery Ward
P300 calculator reveals the manufacturer: Texas Instruments.

The printed circuit board (PCB) of the Montgomery Ward P300 aka TXI-8663A
carries not only the Texas Instruments logo but even the SR-10 designator.

horizontal rule

If you have additions to the above article please email:

Joerg Woerner, October 30, 2008. No reprints without written permission.