Cogar,
It would make sense that it was spun at some point to get the circular tube, base and lip shapes. But when I think of recently-made objects that were "spun" on a wheel as part of an automated factory process, here is a photo of what I mean. This is a different item (from another antiques site I go to occasionally), but you can see the concentric circles in the metal from where it was turned on a wheel and ground. The base on mine looks to have some very mild pitting, as though the original piece of metal came out of a sand mold and was then formed into a circle.
I can't see soldering marks from where the base, tube and lip join each other, but that doesn't mean it wasn't soldered, does it? Maybe the person doing it had a fine touch.
KC,
There seems to have been some sort of coating on the brass which wore away over time. I don't know why anyone would coat brass (other than plating it with a more valuable metal like silver or gold), but I have seen it done. I have some brass pieces which look nearly like solid gold after a good polishing. I assume you are not referring to the welding repair job done on the bottom. It was like that when I bought it, but I don't mind that "been around the block" look. I think it adds character.