Black Sun 24 Carat Gold plated (Concho)

Old Germanic Concho, 35 x 35 mm, 24 Carat Gold plated, 2 rivets, caps including

The 12 monkhoods of Deutschritter-Order at Marien-Castle, the 12 Gods of Asen-dynasty, the 12 knights of King Artus? For sure: it's an Alemannian plate with Alemannian meaning.