frequency meter

Made:: circa 1891 in England

SMG00246513
Science Museum Group
© The Board of Trustees of the Science Musuem

Campbell's patent frequency meter, made by Nalder Bros, 1891.

Details

Category:: Electricity Supply

Object Number:: Y7000.177

Measurements:: 280 mm x 110 mm x 274 mm,

type:: frequency meter

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frequency meter

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