I was encouraged to add photos in my first post about the lamp base marked 1457 on the bottom in which I am trying to replace a slag panel shade with trees. I now have included some photos.
I would like to know who made the base.
Sandy

Your lamp base does appear to be brass or bronze. I do not recognize it's manufacturer and the 1457 does not give me a clue.

It may be difficult finding the matching shade and I might suggest checking local lighting stores and seeing what they might have in stock. Some of the online auctions offer shades occasionally and that would take diligent searching and patience.

It seems like a wonderful lamp and I wish you luck. If you find something please share the results with us.

Fred