Here is my comments from Pyte's TUNGSRAM YELLOW 220-230 V 15 W E 14:

To answer your question about an interesting edge of the painting ---

The bulb was already inside coated with the ceramic yellow paint when the glass was altered by heat to shape the neck of the base of the bulb.  It was originally two separate glass assembly when two combine into one with the envelope and the stem assembly into one glass unit.

This would be so much easier if we could post comments on Pyte's lamp collection.
In my opinion, an awesome collection of lamps & surely worthy of comments.

I dont think i have ever seen so much Tungsram history