OldChristmasTreeLights.com

A Reader writes:

I may not be in the correct area, but I need to identify an old Christmas light bulb I got with a recent Christmas light C-6 purchase. The bulb is C-7 size and shape (candlabra). however the base is C-6 miniature size. The base is brass with markings "60 V. Japan". The filament appears to be a blinker but I am not sure. The bulb is transparent colored amber.
I would appreciate help IDing this item or direct me to another info source.

--------Our Response -------Please log in and add your own if you can ---------------

Are you saying a C-7-sized bulb FITS into a C-6 socket? That would be very unusual.

If the bulb actually takes 60 volts, it might be a one-off made for a specific decoration.

If you can hit reply all and send us photos of the setup, my friend Fred Fox (proprietor of NoellKat vintage Christmas decoration store on Etsy) will take a look.

Thanks for getting in touch - Paul

The reader replied:

Thank you for your prompt reply to my email. I will attempt to attach three photos, which are not terrific but I think you will see enough to see what I have.
--------My response was to ask Fred for his response-----------------

Fred's response:

That would appear to be about a 1960 amber glass Japanese Ballast Lamp for use in 20 Lamp Series Miniature Base Sets that are equipped with individual Twinkling Lamps. Usually one or two of these lamps were used in these 20 lamp sets to take up surges in line voltage when varying numbers of twinkle lamps were in the twinkle 'off' mode. If these were not used, remaining twinkle lamps in the 'on' mode would burn out rapidly as they are of much lower voltage and can not take the voltage surge spike.

The reader answered:

I am delighted with the responses from you and Paul. I understand the info you sent, and appreciate the education.
Many thanks!