This Old House Magazine
December, 2009
Carbon Filament Repros. Shown to the left: 1910 Squirrelcage (front) and 1920 Double Loop (rear) Ferrowatt bulbs.
Carbon Filament Repros. Shown to the left: 1910 Squirrelcage (front) and 1920 Double Loop (rear) Ferrowatt bulbs.