An oval diamond cluster ring

An oval diamond cluster ring, the cushion-cut diamond weighing 3.90 carats, set to the centre of a cluster surround of sixteen brilliant-cut diamonds, weighing a total of 0.80 carats, all millegrain set in platinum with pierced scalloped gallery, with tapered D-section shank, hallmarked platinum, London 2008, bearing the Bentley & Skinner sponsor mark, gross weight 6.5 grams

No. 21615V