Copper-alloy, 9.23 grams, 24.88 mm. Circa 2nd century AD. A cast copper-alloy flat disc with three concentric circles to the upper face, each subdivided into cells, and the edge notched to the upper face. The cells are filled with alternating white and red enamel. To the rear, the shank of the attachment peg is still in place. The stud is very similar to a class of 2nd century disc brooch with polychrome enamel fill, and probably derives from the same tradition. Reference: cf. Hattatt, R. Iron Age and Roman Brooches, Oxford, 1985 item 521. Good very fine condition. Provenance: found Wiltshire, UK.