When life hands you a mysterious bit of vintage avionics, your best bet to identifying it might just be to get it in front of the biggest bunch of hardware hounds on the planet. After doing a teardown and some of your own investigation first, of course.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/06/01/inside-a-mystery-aerospace-computer-with-ken-shirriff/