GECOPHONE crystal radio set. 1922

 GECoPHONE crystal detector set No. 2, model BC1501, by GEC c. 1922, in mahogany cabinet with lift up lid. This set is far less common than the No. 1 set. It has stepped inductance, variometer and variable capacitor tuning, an open-type detector, the Loading Coil shorting link (sometimes missing) and a bracket on the lid with one spare detector mount. The set also includes a very useful refinement to aid setting the detector. When the button in the centre of the panel is pressed, a little buzzer emits weak radio signals that will cause a sound in the headphones when the detector is properly adjusted.