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Additional Pictures 

 

This SEC navtronic 1701r was manufactured in USA  in 1979.

The printed circuit board (PCB) of the navtronic 1701r with six IC's:
National Semiconductor MM5782, MM57129 and
(unknown manufacturer) ITC1200, ITC1210, ITC4800, 2*ITC5028.


horizontal rule

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

Joerg Woerner, January 8, 2012. No reprints without written permission.