Kelmar Systems Inc United Artists Communications 120 Plus Theater Power Amp
Mono amp, I think these originally were sold as pairs and were meant for movie theaters. It is three rack spaces tall
Recently serviced and fully functional, new fuses and caps
My repairman wasn't able to find much info on this rig but stated the circuit was very similar to Hafler amps of the same era.
Good Luck and Happy Bidding!