Information Sheet
Rating: Unknown

Came from: U.S.A.

Manufactured: Prior to 1922

Purchased: March 2003

Price paid: $18.50 plus sh.

Bulb rarity: Very rare

Features: Twin hairpin filaments

Carbon Resistance Bulb

This is a carbon filament resistance bulb. Although it works the same way as a normal lightbulb, it is intended to be a primitive ballast. The 300 on top refers to its resistance. The patina on the base of this bulb is the darkest I have ever seen!

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