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Additional Pictures 

 

This Fixed Income Securities was manufactured in March 1989 
by Texas Instruments in Italy (week 11 year 1989).
Please notice the promising "PROTO 10" carved on the housing.

The TC54256 EPROM with a hand-written label reaveals the 
introduction date of the Fixed Income Securities calculator.


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

Joerg Woerner, May 8, 2008. No reprints without written permission.