LOL, it was an oscilloscope. It was used to read the condition of the spark generated by the ignition to the spark plug, (timing, dwell, among other things). I don't even think modern shops use these anymore. :)
Anyways...I just got back from the CA DMV and I need to fill out a 3 page form in order to get a title history...and it only goes as far back as the last 3 owners. I'll see what happens and keep everyone posted.