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

One tantulum filament lamp. BC holder.

210 volt 200 watt Royal Edison Tungsten filament lamp

Coiled filament lamp

Carbon filament Royal Ediswan lamp with cylindrical bulb

Tantalum filament incandescent lamp

Royal Ediswan metal filament lamp

Siemens tungsten filament lamp

One tantalum filament lamp. BC holder

Cryselco tungsten filament lamp

Osram "atmostype" tungsten filament lamp

1920

Coiled Tungsten Bi-Filament Lamp

Carbon filament electric lamp

Two GEC Osram tungsten filament (not coiled) 230V

Tungsten filament lamp

Osram 6-7v

"Standex" tungsten filament lamp

"Multiplex" multi-filament tungsten lamp

Tungsten filament Osram lamp by GEC Ltd.

Six early electric filament lamps

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

Tungsten Bi-Filament Lamp

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

2 Royal "Ediswan" tungsten filament lamps GES

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