Rockwell Collins 653-3157-002
My research on this card indicates it was used in the 1980's to test and calibrate Collins Avionics equipment on aircraft such as De Havilland Twin-Otters, De Havilland Dash-8 and Bombardier Challenger aircraft. I am sure it requires special software. It is comprised of two circuit cards that fit in one slot on the Apple II Computer.
The card is sold as is and untested as I have no resources to test it. However, it does look in pristine condition. I obtained it from a seller in the Atlanta, Georgia area.
I also researched the card and found an Avionics distributor (AEROVAL) who listed the card for almost $900 in 2002.
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