Material: Unknown non-metallic porcelain-like material with a magnetic metal pin set
Good. The non-metallic material is broken and the pin is bent. The pin
has a small glob of metal at the unattached end possibly indicating that
it was welded or soldered to something.
This appears to be an internal component from some piece of lightweight
technology. The scallops may be detents for a rotating cam that was part
of some kind of variable adjustment.