One of eighty-six early incandescent lamps. Probab
One of eighty-six early incandescent lamps. Probably single loop filament, probably no filament supports. Lead in wires no visible. Pear shaped, with shoulder at base. Deep red colours inside. Sealing pip at top. Bayonet cap, plaster insulated, segmented flat brass contact pads. Robertson etched on glass. 150 - 16 D.E. etched on glass (volls./c.p)
- Object Number:
- carbon filament lamp
- Institution of Electronical Engineering
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