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A.C. ammeter, 0-30

A.C. ammeter, 0-30

Jewell Electrical Instrument Company
1920-1930
AC mil-ammeter

AC mil-ammeter

Weston Electrical Instrument Corporation
circa 1900
ammeter

ammeter

Deprez et Carpentier
circa 1890
ammeter

ammeter

A. K. Eaton
1884-1890
ammeter

ammeter

Weston Electrical Instrument Corporation
1910-1920
Ayrton & Perry's direct reading spring ammeter

Ayrton & Perry's direct reading spring ammeter

Latimer Clark, Muirhead & Company, Ltd.
1883-1893
D.C. ammeter, 0-2

D.C. ammeter, 0-2

Westinghouse Electric & Manufacturing Company
circa 1910
DC ammeter with five ranges

DC ammeter with five ranges

General Electric Company
1940-1970
D.C. microammeter

D.C. microammeter

Weston Electrical Instrument Corporation
1901-1930
exposed Thomson alternating ammeter

exposed Thomson alternating ammeter

General Electric Company
1890-1920
hot wire ammeter

hot wire ammeter

Hartmann & Braun AG
1910-1930
Kohlrausch spring ammeter

Kohlrausch spring ammeter

Hartmann & Braun AG
circa 1900
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