Examples of the type

British Museum, 1926,0116.760
18 mm • 4.25 g • ↑↑ 6h
British Museum, 1921,0213.190
18 mm • 3.96 g • ↑↑ 6h
British Museum, 1920,0907.9
18 mm • 4.06 g • ↑↑ 6h