細節
A Gecophone set of loading coils and reactance coils
Cat. No.BC920, containing three loading coils (BC904, 908 and 900) and three reactance coils (BC906, 910 and 950), in wood case with contents label and part Gecophone transfer; and a further reactance coil, unnumbered but marked 25R300
Cat. No.BC920, containing three loading coils (BC904, 908 and 900) and three reactance coils (BC906, 910 and 950), in wood case with contents label and part Gecophone transfer; and a further reactance coil, unnumbered but marked 25R300