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细节
A Hetrodyne Wavemeter by H. W. Sullivan Ltd., London
No. 576, with laquered brass terminals, buzzer, tuning dial and loading coil socket for coils marked A,B,C, and E,F,G,H, all marked with No 576, on ebonite panel in mahogany box base -7¼in. (18.3cm) wide
No. 576, with laquered brass terminals, buzzer, tuning dial and loading coil socket for coils marked A,B,C, and E,F,G,H, all marked with No 576, on ebonite panel in mahogany box base -7¼in. (18.3cm) wide