Early Light Bulbs: SIEMENS CARBON FILAMENT 220 VOLT LIGHT BULB, 1900's
SIEMENS CARBON FILAMENT 220 VOLT LIGHT BULB, 1900's
Early light bulb made by Siemens with carbon filament.
Like Robertson many companies started producing carbon filament lamps once the Edison Patent had expired.
For more information see Item A0695.
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