School Radio Showing At British Industries Fair -- A radio receiving set, with radiogram, and microphone attachments, specially designed for use in schools will be among the exhibits shown by the Ultra Electric Co. at the British Industries Fair which opens in Birmingham and London on May 3rd.The set is made to the specification of the London Country Council as a schools receiver. Though housed in a steel cabinet, it is entirely shock-proof and passes the highest safety standards in force anywhere in the world. The set has nine valves. April 02, 1948. (Photo by British Official Photograph).