Further to my post on the Black Sun being based on an Zierscheiben - I thought I'd share these many examples.
Zierscheibe is German for "ornamental disk", and where found in women's graves and are thought to have been worn as pendants attached to the tunica, or as part of a belt pouch.
Early examples date to the Late Bronze Age (ca. 800 BC). They develop into characteristic designs notably attested from Alamannic graves from the migration period.