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| Info about this bulb |
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Rating: unknown (110v 40w?) Came from: U.S.A. Manufactured: 1909-1922 (est. 1915) Purchased: January 2003 Price paid: $35 plus sh. Estimated value: $30+ in good working condition Bulb rarity: very rare Best feature: True Blue glass |
| Tipped Cobalt Blue Edison Mazda Lightbulb |
This is a Cobalt Blue, cage filament, Edison Mazda lightbulb. This is the tipped variant, and it is VERY scarce. The little glass tip on top tells us that this bulb was made before 1922. Bulbs like these were commonly used for theater stage illumination. The filament that this bulb uses is a "cage filament" made of tungsten. It is supported by a glass rod which has several hooks on it. The usual amount of hooks is 10, but there can be many more, especially in the case of 220 volt bulbs. People often find this type of filament hard to describe. It is simply a very long continuous filament, not multiple filaments as most people usually say by mistake.
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