Greetings and Happy New Year
I recently uncovered some bulbs that I don't seem to be able to find much about and would like to know a bit more about their manufacture date if possible.
The manufacturer is The Columbia Incandescent Lamp Co.
ST. LOUIS, MO.
100v, I have both 8 and 16cp versions as some still had a paper label with their rating.
Glass base, I'm guessing circa 1905?
![](http://iforce.co.nz/i/a4qam44f.ox5.jpg)
There's a paper insert in the stem that has patent information that I've tried to capture.
![](http://iforce.co.nz/i/yh2kuid5.1aj.jpg)
Regards.