I am new to this forum and to the antique light bulb world. My primary collector interest is vintage radios and communication equipment. I grew up in the world of tube electronics and enjoy the warm glow and sound they produce. The little I know about antique bulbs I have learned from this wonderful site and other web resources. I am looking to members of this forum to enlighten me from your wealth of subject knowledge.
About the Bulb
I have this single light bulb within my collection of radio items. It sits on display with radio tubes but I know little about it.
? Incandescent, tipped, clear envelope
? 5? tall by 2.5? dia.
? Westinghouse Pin Base. I think the insulator is plaster.
? Double loop hairpin filament.
? The filament is supported by two glass anchors at the top of the bulb.
? The envelope is in excellent condition, clear and unblemished.
? The filament appears to be good. Resistance measures 1,350 ohms.
? The metal base has a hole (from arcing?) in the side that does not appear to have impacted the envelope.
? The filament lead connection to the base has come free from its solder connection. To measure resistance I connected directly to the loose wire.
? The stem has some writing on it that I cannot decipher. I find no other identifying marks.
I have not tried to apply power to this bulb and do not plan to do so out of fear of damaging it. I do have both a Variac and a variable regulated DC power supply to use should I choose to do so.
What is it? Manufacturer/brand, approximate year of manufacture, filament material, physical & electrical characteristics, usage, ?? Any corrections to my assumptions, clarifications, description or additional information you provide would be greatly appreciated. I would like to present this in my collection with an accurate description.
I learned from this initiative that photographing a bulb is challenging. Not knowing what views would be important I took pictures from many orientations. I?ve included two images in this post and provided web links to many more. If anyone would like original resolution pictures let me know and I?ll email them.
Thanking you in advance for your attention and assistance,
Stem pictures. This was my attempt to read the writing there-on.https://www.icloud.com/photostream/#A8Grq0zwq5fyC
These photos use Apple iCloud photo streaming. On a non-apple PC:
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? Click the Slideshow button (top right of screen) to view slideshow.
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