6th-7th century AD. A gold finger ring with discoid bezel, incuse monogram comprising a cross with letters N, K, A, O. Cf. Wamser, L., Die Welt von Byzanz - Europas Östliches Erbe, München, 2004, item 644, for type.11.79 grams, 24.15mm overall, 18.70mm internal diameter (approximate size British T, USA 9 1/2, Europe 21.26, Japan 20) (1"). Property of a London lady, part of her family's collection; acquired in the 1970s; accompanied by an independent specialist report and valuation by graduate gemmologist and jewellery expert Anna Rogers, GIA GG, BA, Gem-A, ref. no. 170118/07/12/2020.