My parents found these in my deceased uncle's garage without any useful accompanying information. He was a bit of a hoarder, but usually of only free things, not known for purchasing antiques
Solved by @Davel23@fedia.io Swing arm curtain rods
The small rod at the top makes me think that it fits somewhere holding the entire pole horizontal. The small gap in the circle suggests that it is supposed to allow something to go through and the hooked tip might be holding whatever is hanging from the pole.
Like an ornate top pole for a banner flag.