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Additional Pictures 

 

This SR-50 was manufactured in December 1974 by
Texas Instruments in the Netherlands (Date code 504 wk 50 yr 1974).

The printed circuit board (PCB) of the SR-50 is centered
around the TMC0501 / TMC0521 building blocks.

The additional PCB found inside the SR-50 with the display drivers,
the LED-display and the keyboard assembly for the keys.

The display bezel of this unique SR-50 calculator
doesn't look like a Do-It-Yourself job.
 


horizontal rule

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

Joerg Woerner, November 1, 2011. No reprints without written permission.