Ultra Modern -- There were many novelties and innovations in radio at "Radiolympia" the trade show which opened at Olympia, London, today. A visitor from Holland inspects the Kolster-Brandes model BW 20 Wall Set. It is a 4-valve reflex superhet for AC mains, specially designed for hanging on the wall in restricted space, and will sell for ?14. 0. 0d. plus ?3. 0. 3d. purchase tax. September 30, 1947. (Photo by Fox Photos).