ZENITH R-520A/URR TRANS-OCEANIC SHORTWAVE RADIO for PARTS or REPAIR For Sale

This is a Zenith Trans-Oceanic R-520A/URR, there were less than 3000 of these manufactured in 1956, Serial # 1762. I checked the tubes and they tested good, one of the 1U4s is minimum but ok. The 1L6 tested good and is marked US Army. I have no way of checking ballast tube so I do not know about it. The radio makes no effort to play, no sound of any kind and I have no clue to problem. The chassis looks good to me, the yellow you see is a coating they used for protection against humidity. The pushbuttons, small red switches, off/on and tuning dial work. The wavemagnet and pullout antenna are good. I have tried to list all that I know about this radio and shown as many photos as possible. If any questions please ask.