Bos (2008) Type 2.3.1.2 = disc fibula with central glass enamel and hubcap-like design with 8 holes restored
Literature:
Definition des Fibeltyps:
J. M. Bos, Medieval brooches from the Dutch province of Friesland (Frisia). A regional perspective on the Wijnaldum brooches. Part II: Disc brooches. Palaeohistoria 49/50, 2007/2008, 709–793.