First non-Memory console was the "Wall-o-Dimmers" in 1983. When you locked all the handles in together to do a full stage dim it took two people to have enough strength to lift them up or pull them down. Then you had to watch out for those times when showers of sparks would shoot out the dimmers. Ahh the "good" old days. Amazingly they didn't replace those things with moder dimmers until the mid 90's. Our little theater had 8 circuits and four dimmers. We had two electrics of Red, Blue, Yellow, and White colored household outdoor floodlights (the kind people buy at Christmas). The apron was lit by one row of white household flood lights. There were two floor pockets. My senior year I got a guy to weld a 10' piece of muffler pipe to a tire rim for me and I had a boom. I ran power from the floor pockets out to the back of the house into a home made box with two light switches on it plugged in two 360's from the big stage and for the first time we had light on the faces of actors without hollow eye sockets. It was blinding to the actors and not the safest thing in the world to do (don't do it kids!) but my career had begun.
Date? I'm not sure 1984 - 6 maybe. Strand M24. Pre DMX but it was a genuine memory board. There's still one in a theatre here in Adelaide. I try not to go there.
1980's LSC can't remember the model name.
I discovered ETC in 1995 except that it was an Arri board then. I love the Insight