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- Western Electric Company Resistance Box, circa 1910 -
- circa 1910
- Collections - Artifact
Western Electric Company Resistance Box, circa 1910
- Evershed & Vignoles Bridge Megger Resistance Box, circa 1914 -
- circa 1914
- Collections - Artifact
Evershed & Vignoles Bridge Megger Resistance Box, circa 1914
- Edison Lamp Company Resistance Box, 1882-1889 -
- 1882-1889
- Collections - Artifact
Edison Lamp Company Resistance Box, 1882-1889
- Resistance Unit -
- Collections - Artifact
Resistance Unit
- Leeds & Northrup Wheatstone Bridge Test Set No. 5430, Used by Ford Motor Company, circa 1928 -
- circa 1928
- Collections - Artifact
Leeds & Northrup Wheatstone Bridge Test Set No. 5430, Used by Ford Motor Company, circa 1928
- Edison Machine Works Resistance Box, 1883 -
- 1883
- Collections - Artifact
Edison Machine Works Resistance Box, 1883
- Bergmann & Company Resistance Box, 1881-1889 -
- 1881-1889
- Collections - Artifact
Bergmann & Company Resistance Box, 1881-1889
- Bergmann & Company Resistance Box, 1881-1889 -
- 1881-1889
- Collections - Artifact
Bergmann & Company Resistance Box, 1881-1889
- No. 6A Telegraph Resistance Box, circa 1900 -
- circa 1900
- Collections - Artifact
No. 6A Telegraph Resistance Box, circa 1900
- Resistance Box -
- Collections - Artifact
Resistance Box