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).