Pretty. No idea as to maker. Does it matter?

That's what I was thinking. What you may find is that the maker of these might be more in the 'fixture' business than some famous lamp maker. By fixture, I mean this lamp evidently was meant to complement and be built into your house's interior. Have you ever seen an old house with the lamps on the end of the newell posts of a stairway?

I've not seen lamps built into the mantles of fireplaces, but I don't see why not. One of my previous homes, built in the Edwardian era, did have at one time a light built into the post at the bottom of the stairs. So, it may be just a piece of house hardware fixture.

It is quite pretty, btw, and pretty authentic to the dates you mentioned.

I have seen more than a few houses with hard wired mantle "candle sticks". These look to be maybe 1915 or so....likely white bronze ....an alloy of tin, zinc and ??? often used for cast items.
It's been years....I remember my uncle's house had those mantle lamps....but not with shades but with amber tinted bulbs.

There is no way they're going to be circa 1915 with a patent date of 1921

LOL! Well likely not....perhaps they are 7 or 8 years later than I said.

hmmm...per the link below

Application No. US 439286 A filed on 22-Jan-1921
Inventors
CAWLEY ALOYSIUS J

Here is a link that might be useful: Daylight-projecting system