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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
2.5-inch projection lens

2.5-inch projection lens

Ernst Leitz (company)
circa 1956
3-ring universal ring sundial

3-ring universal ring sundial

Italian
1764
3-ring universal ring sundial

3-ring universal ring sundial

Etienne Lenoir
circa 1780
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
AC ammeter

AC ammeter

Weston Electrical Instrument Corporation
circa 1930
AC ammeter

AC ammeter

Weston Electrical Instrument Corporation
circa 1900
Acme Reproducer Double Free Edge Cone type K-1 loudspeaker

Acme Reproducer Double Free Edge Cone type K-1 loudspeaker

ACME Apparatus Company
1926-1927
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