BULB DISCUSSION BOARDS > Antique Bulb Discussion

Japanese flower bulbs - antique?

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laurelll:
Hello -

I have a pair of vintage bulbs that my great-uncle purchased in Japan in the 1940s.  I've scoured the internet and haven't been able to find anything similar to these.  I have no idea if they work, we haven't tried in 40+ years.  They are approximately 5.5 inches long, from tip to base.

Thank you!

Laurel

James:
These are known as Kokka lamps, made by the Kokka-Hana Denkyu company in Japan.  Often they contain two separate filaments, which will light up individually depending on how far you screw the lamp into its socket (the end contact has a leaf-spring terminal which bends when screwed deeper into the lampholder, and makes contact to the second filament).  If you Google Kokka lamp, you will find further details on these.

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