3 Vintage Bakelite UFOs Unidentified Found Objects

Description

UFOs - Unidentified Found Objects
Picked these items up at estate sales many years ago and have no idea what they are.
The item on the left is brass with a chocolate brown Bakelite nob.  The pointed “spear” goes through a hole in the nob.  The plate has holes around the edge for, what I assume, is to mount it on something.
The top center item is reverse-carved light apple juice Bakelite with inset rhinestones.  The two round pieces are connected with a thing pin-like bar.  The bar is not secure on one side and comes out of the round disc.
The bar has a pointed end with screw threads, but it doesn’t screw tightly into the disc.  The item on the right is butterscotch Bakelite; the two sides come apart and are held together by an embedded screw.
Condition: Good condition.  Clean and from a smoke-free environment.
Please look carefully at all of the pictures, as they are an integral part of description.
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I have more Bakelite listed - bracelets, earrings, beaded necklaces, and several miscellaneous items.