Casgliadau Arlein

A fragment of metalworking mould.

The surface has a partial impression of a keying boss, possibly for a bivalve mould. The shape of the keying boss is a protruding round dome. The fabric is fine orange oxidised

From Group F, Keying Bosses One of five keying boss fragments from St Patrick's Chapel that all make similar round shapes. As keys for bivalve moulds they lack the asymmetry found on early medieval moulds elsewhere. The alternative interpretation is that they represent the casting of central hollow bosses on larger castings.

Canoloesol Cynnar, tri ddarn mowld ceramig i gweithio copr