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1-1-10 ampere shunt

1-1-10 ampere shunt

Weston Electrical Instrument Corporation
late 19th-early 20th Century
1amp shunt

1amp shunt

Weston Electrical Instrument Corporation
circa 1912
3 stage audio amplifier

3 stage audio amplifier

General Radio Company
5 amp shunt

5 amp shunt

Weston Electrical Instrument Corporation
circa 1912
8-inch hot cathode high vacuum x-ray tube

8-inch hot cathode high vacuum x-ray tube

Westinghouse Electric & Manufacturing Company
circa 1925
10 amp shunt

10 amp shunt

Weston Electrical Instrument Corporation
circa 1912
100 amp shunt

100 amp shunt

Weston Electrical Instrument Corporation
circa 1912
1000 amp shunt

1000 amp shunt

Weston Electrical Instrument Corporation
circa 1912
AC ammeter

AC ammeter

Weston Electrical Instrument Corporation
circa 1930
AC ammeter

AC ammeter

Weston Electrical Instrument Corporation
circa 1900
AC mil-ammeter

AC mil-ammeter

Weston Electrical Instrument Corporation
circa 1900
A.C. voltmeter, 0-125

A.C. voltmeter, 0-125

Weston Electrical Instrument Corporation
circa 1925
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