One of eighty-six early incandescent lamps. Zig-z
One of eighty-six early incandescent lamps. Zig-zag filament. One filament support into sealing pip. Platinium leads pass through seperate seals in bulb. Pear-shaped bulb, with shoulder at base. Top pip. Bayonet cap base, with shoulder and flate elliptical brass contact plates. porcelain insulated otherwise hollow. Manufacturer unknown, but handwritten label stuck to base says "German make." 200 - 16 on base (volts - c.p.). Filament shape similar to Bristol Electric height Co. Lamp1923-173/7D.
- Object Number:
- carbon filament lamp
- Institution of Electronical Engineering
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