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Incandescent:
C
carbon
WD
drawn tungsten
WC
coiled tungsten
WM
mini tungsten
WS
pressed tung.
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christmas sets
T
tantalum

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argon lamps
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xenon lamps
MA
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fluorescent
MS
special mercury

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F
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fixtures
PF
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SA
sockets
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ws0005  

 

 
history and origins
 
Manufacturer / Brand Name
Unknown

Country of Origin
Unknown

Factory Location
Unknown

Date of Manufacture
ca.1907 ?
 
electrical attributes
 
Voltage
Unknown

Wattage / Candle Power
Unknown

Amperage

 

physical attributes
 
Envelope
1.55" Dia.
Atmosphere
Vacuum


Finish / Color
Clear
Filament
Twin Hairpin

 
Base
Bayonet; Double Ended
 
 
comments
  This unusual lamp has a tubular shaped envelope with electrical contacts at each end. The base at the stem end has engagement pins similar to a standard bayonet base, while the opposing end is smooth. The metal shells, which form the electrical contact at each end, are both hallow and filled with plaster. The filament assembly is supported by the glass stem, while a coil shaped wire supports the opposite end of the assembly and also carries electricity to the filament. This lamp had a special purpose, but that purpose is currently a mystery. This lamp is most likely European. The endcaps are made of steel.