Additional Pictures 


This Pool Water Analysis calculator with the date code ATA1779 was
manufactured in Abilene, TX in May 1979.

The OLIN Pool Water Analysis module
with copyrights from 1979.

Inside the module we located
a standard TMC0540 with a 
ZA5539 ROM-Code.

The base calculator of this Pool Water Analysis calculator is a
standard TI-58C manufactured in 1979.

horizontal rule

If you have additions to the above article please email:

Mark Bollman and Joerg Woerner, August 3, 2008. No reprints without written permission.