Copper-alloy, 5.33 grams, 16.69 mm. 1st-3rd century AD. A good example of a Roman openwork plate brooch. The design comprises four intersecting openwork circles with a vesica at the central junction. The outer extremities extend into discoid lobes. Each lobe and the central vesica bears a disc of organic material (probably amber) fixed with a tiny rivet. The circles and vesica are delimited by parallel series of punched dots. The catchplate and pin are complete. Reference: Hattatt, R. Brooches of Antiquity, Oxford, 1987, p.216-8. Extremely fine condition.