Disc brooch with central glass flow and seven pits (type 2.3.1.8 according to Bos 2007/2008) on the back remains of needle suspension and rest as well as corroded needle remains (?)
Literature:
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.