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Gambrell Rowse 1936
RTE 1936 Marconi 1939 Short & Mason 1939 Brush Crystal 1953 G.E.C. 1953 Trevor Johnstone 1953 Vicom 1953 Marconi 1958 Marconi 1958 C & N Electrical 1960 Decca 1960 Intl Aeradio 1960 Ketay 1960 Marconi 1960 Marconi 1960 Murphy 1960 Thermionic 1960 Cossor SSR 1961 Cossor SSR 1961 Cossor CRD23 1962 Cossor SSR1251 1962 Selenia 1967 |
R.T.E. 
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