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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 diffraction color photographs, slit, color photograph on lantern slides

3 diffraction color photographs, slit, color photograph on lantern slides

American
circa 1906
5 amp shunt

5 amp shunt

Weston Electrical Instrument Corporation
circa 1912
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
Abbe refractometer, Zeiss Model I

Abbe refractometer, Zeiss Model I

Carl Zeiss Jena
circa 1915
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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