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Additional Pictures 

 

This TI-31 was manufactured in June 1987 by
Toshiba in Japan (Date code T-0687 mth 06 yr 1987).

The printed circuit board (PCB) of the TI-31 sports a typical Toshiba design.

The TI-31 is centered around a Toshiba T6974S single-chip calculator circuit.


horizontal rule

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

Joerg Woerner, February 11, 2019. No reprints without written permission.