| TI SR-40 USA - 1976 Scientific, Programmable Red Led |
 |
| "Texas
Instruments SR-40 - 5076 USA 2200153.
The famous TI-30 was available in a luxury edition under the logo
SR-40. Instead of the simple black keys of the TI-30, it used keys
with molded lettering, and the battery was replaced with a chargeable
battery kit."
Joerg Woerner |
|