Attached is a little preview of a 1979 Missile Command main board that I ran across a few years ago. I also have the regulator/power supply II board too.
If anyone wants to see Dave take a look at it, I'll send it in.
This one even has the original burned Pin 1 on the J1 edge connector. It was a common problem with the early games. If I send it in, you'll see the work-around that was most commonly done in the days when video arcades would often have a tech on staff who did component level repair.
-D