BYZANTINE HIGH KARAT GOLD AND NIELLO RING DEPICTING MONOGRAM Ca. AD 600. A slender gold hoop with a smoothly tapering, unadorned profile. The flat rectangular bezel is engraved with a niello-filled monogram composed of interlaced letters, and bordered by incised triangular marks at each corner. Size: D:14.27mm / US: 3 / UK: F 1/2; Weight: 3g Provenance: Private UK collection; formerly in a 1980s-1990s London collection. This item has been cleared against the Art Loss Register database and comes with a confirmation letter.