No markings on it but this appears to be a RA-84 AC power supply for the Hammerland BC-779, BC-794, and BC-1004 series of radio receivers. Looks like it has been modified or repaired at some point. On/Off switch and power indicator light has been added as well as an AC in line fuse, power transformer may not be original. This has been tested and there is voltage at all termination points. The original fanning strip is intact. Heavy - 33lbs unpacked.