Additional Pictures 


The sales box of a Western Auto M4988 Citation sold around Spring 1977 in the US.

This Western Auto M4988 was manufactured in April 1977 by
Texas Instruments in Lubbock, TX (Date code 1577 LTA week 15 year 1977).

The M4988 manufactured in April 1977 in Lubbock, TX
with the front part of its housing removed.

The printed circuit board (PCB) of the featured M4988
is centered around a TMS0974 single-chip calculator circuit.

Close-up view of the TMS0974 packaged in a
28-pin SPDIP (Shrink Plastic Dual In-line Package).

Product Label Style 3, Beige, Western Auto of the featured M4988.

horizontal rule

If you have additions to the above article please email:

Joerg Woerner, July 5, 2021. No reprints without written permission.