Additional Pictures 


The sales box of a Western Auto 66-4988-3 "Citation" sold in Summer 1978 in the US.

This Western Auto 66-4988-3 "Citation" was manufactured in April 1978 by
Texas Instruments in El Salvador (Date code 1678 week 16 year 1978).

The 66-4988-3 "Citation" manufactured in April 1978 in El Salvador
with the rear part of its housing removed.

The printed circuit board (PCB) of the featured 66-4988-3 "Citation" is centered
around a TMC0921 single-chip calculator circuit hidden under the VF-Display.

horizontal rule

If you have additions to the above article please email:

Joerg Woerner, July 6, 2021. No reprints without written permission.