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细节
A Mark III Tuner
No. 921, Short Wave, by Robt. W. Paul, London N., with closed and aerial circuit inductances and condensers, carborundum and quadruple-turret Perikon detectors and mahogany case with instruction card in lid and folding alloy legs -- 13in. (35cm.) wide,circa 1916
No. 921, Short Wave, by Robt. W. Paul, London N., with closed and aerial circuit inductances and condensers, carborundum and quadruple-turret Perikon detectors and mahogany case with instruction card in lid and folding alloy legs -- 13in. (35cm.) wide,circa 1916