拍品專文
Cf. no. 28 in Bathke, Ringe Aus Vier Jahrtausenden im Schmuckmuseum Pforzheim, Frankfurt, 1963; and no. 6-e and 179-P in Ross, Catalogue of the Byzantine and Early Medieval Antiquities in the Dumbarton Oaks Collection, Vol. II: Jewelry, Enamels and Art of the Migration Period, Washington, D.C.