One of eighty-six early incandescent lamps. Carbon

One of eighty-six early incandescent lamps. Carbon filament lamp, single looped filament, small minor glass stem, with 3 part "Siemens seal" (carbon attached directly to upper copper wire). Pear shaped clear bulb. Top pip, broken. Cylindrical brass cap attached by Plaster of Paris with projecting central split pin for second contact. "Siemens" handwritten on cap. Stuck-on paper labelsays 100/16 (volts/c.p. ?)


Object Number:
carbon filament lamp
Institution of Electronical Engineering

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