Montgomery Ward P8P aka TXI-8645A

Date of introduction:  August 20, 1973 Display technology:  LED-modules + lens
New price:  $79.50 Display size:  8
Size:  5.7" x 3.1" x 1.6"
 146 x 79 x 41 mm3
Weight:  5.1 ounces, 144 grams Serial No:  37X-0066692
Batteries:  4*AA Date of manufacture:  
AC-Adapter:   Origin of manufacture:  USA
Precision:  8 Integrated circuits:  TMS0128
Program steps:   Courtesy of:  Scott Malone

This neat calculator does not look like a Texas Instruments product. But you'll notice easily that it is related to the P8F alias TXI-8644A calculator. An identical housing was used for the P8M alias TXI-8646A calculator, too.

This calculator looks very unfamiliar compared to other Texas Instruments calculators. Please notice the combined [-=] and [+=] keys not known from other pocket calculators sold by TI.

Don't miss the rare TXI-8661A based on the Exactra 23 calculator and the electronic Wizard distributed by Western Auto.

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If you have additions to the above article please email:

Joerg Woerner, December 5, 2001. No reprints without written permission.