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Additional Pictures 

 

This Exactra 23 was manufactured in November 1974 by Texas Instruments
(Date code 484 wk 48  yr 1974).

The Exactra 23 with its 8-digit Bowmar Opto-Stick display and costly keyboard.

The membrane switches of the keyboard.

The double-sided printed circuit board (PCB) of the Exactra 23.

Close-up of the TMS0803 single-chip calculator circuit.


horizontal rule

If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, November 18, 2018. No reprints without written permission.