Marked: (Panel nameplate reads) RCA / Radiola 20 / Reg. U.S. Pat. Office / See license notice inside / Radio Corporation of / America. (Under top lid is license & patent notice) Title reads: Radiola ...

Marked on receiver unit: "Radio Receiver / World Wide Wireless [General Electric] / Licensed for Amateur and / Experimental Use Only"; on amplifier: "Detector-Amplifier / Vacuum Tube / Model AA-1400-A ...