This is a Military HF Receiver, Type RBO-2 made by the H E Scott Radio Labs. The is a 3 band receiver, 55 - 160 Khz, 5.6 = 10.0 Mhz, and 9.2 - 15.5 Mhz. The receiver is in fair physical condition for it's age. It is missing a 6V6 electron tube and a power cord. It is untested.