Copper-alloy, 41.96 grams, 80.88 mm. 4th-9th century AD. A flat cast plaque intended for use as the upper arm of a processional or altar cross. The trapezoidal body of the plaque extends at the upper corners to discoid lobes, with a third, larger lobe placed centrally between them. The large lobe is decorated with an incised inner border, within which is a grid with bilinear outline; the neck bears a zigzag design. Each of the corner lobes bears a border with a cross within, extending to a zone of incised pointed triangles between transverse zigzag features. At the lower edge of the plaque is an incised face with double outline to the head (possibly a nimbus?) and omega-shaped eye-and-nose feature; at the lower end of the nose is a hole for the attachment rivet. On the central field is a short text in Byzantine Greek capitals: O[.]GIOSGO/O[.]RGI (perhaps Hagios Giorgi 'Saint George'). The reverse of the plaque is plain. Reference: cf. Byzantine iconography in Loverance, R. Byzantium, London, 2004 p.62. Good very fine condition. Provenance: from an old English collection.