File:Roman brooch (front and reverse) (FindID 122818).jpg

English: The brooch is made from cast copper and decorated with blue glass or enamel. The body of the brooch is circular in plan, and in profile is domed. The reverse is hollow. The convex surface is decorated with a small circular cell at the apex. Around the edge there are triangular cells forming a border each filled with blue glass or enamel. Between this border and the apex there may be other decorative cells in the field, but these are not clear. There is a fleck of blue glass or enamel which suggests further decoration in the field. Integral and protruding from the edge of the brooch is a small sub-rectangular block, which, on the reverse, has two integral parallel lugs. This is the remains of the hinge. The spring, pin and catchplate are all missing. The surface of the brooch has a mid brown/green patina and soil remaining adhered to it. The edges are abraded. It measures 24.03mm long, 17.77mm wide and 6.39mm thick. It weighs 2.2g. The brooch is Roman. Bayley and Butcher (Bayley and Butcher, 2004 Roman Brooches in Britain: A technological and Typological Study Based on the Richborough Collection Society of Antiquaries) describe this style of brooch as being an umbonate disc brooch, and consider them to be a product of the 1st century.