1920 AD FOR INTRO OF CONE SHAPED BULB
Posted: Mon May 09, 2016 9:13 pm
1920 AD FOR INTRO OF CONE SHAPED BULB
That's cool, Maria, I think it's an important indicator of how and when the bulb shape shifted.
I've added your graphic to the main archive at the bottom of this page:
http://oldchristmastreelights.com/1900_1920_page_2.htm
Thanks bunches,
Pau