Vintage tube mic preamp/EQ Pair! One Of A Kind

Digging through my storage unit recently and came across these super rare mic pre/EQ's that I've had packed away for the past 25 years. I moved to Hollywood to do the Studio thing in the late 90s and not long after I came across someone who knew someone who knew of an old Studio on Western Avenue that was about to be torn down and it still had gear inside. Needless to say, I went over immediately to see what I could find and work a deal with the owner. The best score by far was four of these custom made mic pre-?? EQ units, they have no markings of any kind so they must have been built in house by the tech back in the 50s or 60s??

Only three knobs on the front, gain, high EQ and low EQ, most likely 100hz & 10k?? Each unit has three tubes? 2 12ax7's and a 5y3 rectifier. Each unit also has a UTC HA-113?

Anyway, I've been hoarding these things for years with the intentions of restoring them and recapping them but I just haven't got around to it and I'm not recording much anymore so it's time to pass them on?