Additional Pictures 


The SR-50A, SR-51A and SR-56 calculators (from left to right) used in the last 
production year more or less identical printed circuit boards (PCB's).
 The only differences are the missing program / data memory and different SCOM chips.

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If you have additions to the above article please email:

Joerg Woerner, June 7, 2005. No reprints without written permission.