Additional Pictures 


The internal view of the TI-31 SOLAR (left) manufactured in Japan and 
a BA-SOLAR assembled in China (right). Please notice the solar cells.

The Toshiba T6974S single-chip calculator circuit found in the TI-31 SOLAR.

The printed circuit board (PCB) of the TI-30 SLR+ looks identical.

The printed circuit board of a late TI-35 SLR...

With a manufacturing code dated November, 1989 this TI-35 SLR
seems to be one of the first calculators assembled in China.

If you have additions to the above article please email:

Stefan Klaes and Joerg Woerner, September 23, 2003. No reprints without written permission.