DATAMATH CALCULATOR MUSEUM
This SR-50 was manufactured
in May 1975 by
|The printed circuit board
(PCB) of the SR-50 is centered
around the TMC0501 / TMC0521 building blocks.
additional PCB found inside the SR-50 with the display
the LED-display and the keyboard assembly for the keys.
date code of the Integrated Circuits (IC's)
manufacturing date of week 16 in the year 1975.
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© Joerg Woerner, November 1, 2011. No reprints without written permission.