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"Osram-GEC" tungsten filament lamp, BC holder.

Coiled filament lamp

Siemens tungsten filament lamp

Tantalum filament incandescent lamp

210 volt 200 watt Royal Edison Tungsten filament lamp

Cryselco tungsten filament lamp

Coiled Tungsten Bi-Filament Lamp

Carbon filament electric lamp

Two GEC Osram tungsten filament (not coiled) 230V

Royal Ediswan metal filament lamp

Carbon filament Royal Ediswan lamp with cylindrical bulb

One of four early Swan bamboo filament lamps rated: (a) 65v

One of four early Swan bamboo filament lamps rated: (a) 65v

Osram "atmostype" tungsten filament lamp

1920

Tungsten filament lamp

Osram 6-7v

One tantalum filament lamp. BC holder

"Standex" tungsten filament lamp

One tantulum filament lamp. BC holder.

"Multiplex" multi-filament tungsten lamp

Tungsten filament Osram lamp by GEC Ltd.

One of four early Swan bamboo filament lamps rated: (a) 65v

Filament lamp: large hand-made spherical lamp by G.E.C.

One of four early Swan bamboo filament lamps rated: (a) 65v

Four early Swan bamboo filament lamps rated: (a) 65v

Tungsten Bi-Filament Lamp

Six early electric filament lamps

2 Royal "Ediswan" tungsten filament lamps GES

Metallized filament lamp, 250 watts, 100 c.p.