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- Edison Lamp Company Indicator, 1886-1889 -
- 1886-1889
- Collections - Artifact
Edison Lamp Company Indicator, 1886-1889
- Edison Lamp Company Resistance Box, 1882-1889 -
- 1882-1889
- Collections - Artifact
Edison Lamp Company Resistance Box, 1882-1889
- Edison Lamp Company Indicator, 1887-1889 -
- 1887-1889
- Collections - Artifact
Edison Lamp Company Indicator, 1887-1889
- Edison Lamp Company Indicator, 1887-1889 -
- 1887-1889
- Collections - Artifact
Edison Lamp Company Indicator, 1887-1889
- Edison Lamp Company Voltmeter, circa 1886 -
- circa 1886
- Collections - Artifact
Edison Lamp Company Voltmeter, circa 1886