WESTONS ELECTRICAL INSTRUMENT MADE IN USA AM METER 1888年製
WESTONS ELECTRICAL INSTRUMENT MADE IN USA AM METER 1888年製,Weston Model 301 Volt Meter Vintage Electrical Instrument,Weston Electrical Instrument Company Model 412 No. 334,Weston Electrical Instrument Company | Science Museum Group,NIHF Inductee Edward Weston Invented Electrical Measuring