Examples of the type

British Museum, RPK,p113B.1.Calc
30 mm13.97 g 12h
SNG BM Black Sea 133
British Museum, 1979,0101.84
27 mm12.64 g 11h
SNG BM Black Sea 134
British Museum, 1979,0101.85
26 mm13.03 g 12h
SNG BM Black Sea 135