This is a vintage Realistic Stereo Mixing Console 32-1210 - my father was a musician and this was one of his many gadgets.
It has been re-wired in its life to convert to DC from mains - no doubt to replace a faulty power supply. It powers up, the left hand VU meter does not illuminate but the right hand one does. I have no means of testing it at all, so it is 'as seen'. It'll make a good winter project. I don't know what its capabilities are, so please do your own research via Google etc.
Available for collection from near the RUH.