One of eighty-six early incandescent lamps. Carbon

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One of eighty-six early incandescent lamps. Carbon filamentlamp, single looped filament, no supports. Short lead in wires, filted through blue glass pieces, attached to bulb. Clear round bulb, without neck. Top pip.Single contact bayonet cap, with shoulder attached & insulated with plaster. Manufacturer unknown. No markings.

Details

Category:
Lighting
Object Number:
1923-173/81
type:
carbon filament lamp
credit:
Institution of Electronical Engineering