Here's a pic from 1975. This was the album cover of our first release, and we used a pic of an older console built by our small company, Amphion, (probably 1973-4) instead of conventional artwork because (a) it tied in with the album title, "Ruff Mix", and (b) we couldn't afford real artwork.
At the top of the console partially visible were the 7-band eq's on the outputs. There were also provisions (although not installed on this unit) for a three-way (tri-amp) send from the console. Unit had a spring reverb and a mil-spec connector for a 16ch snake.
Lots and lots of hand wiring. No IC's, all transistors, built mostly out of ignorance because we truly didn't know better.