Additional Pictures 


This Longines Symphonette Electronic Calculator
was manufactured in December 1972 by Texas Instruments.

The printed circuit board (PCB) of the Longines Symphonette Electronic
Calculator. This PCB was located in a "B-series" calculator.

Close-up view of the TMS0103 single-chip calculator circuit.

Close-up view of the SN75491 segment driver chip.

Close-up view of the SN75492 segment driver chip.

Close-up view of the DIS40 display module.

Close-up view of the DIS95 display module.


horizontal rule

If you have additions to the above article please email:

Joerg Woerner, September 30, 2008. No reprints without written permission.