A single stone marquise-cut diamond ring

A single stone diamond ring, the marquise brilliant-cut diamond weighing 1.01 carats, of F colour, VVS1 clarity, Gemmological Association of Great Britain certificate number 017298, six claw-set to a platinum collet with plain pierced gallery, six graduated brilliant-cut diamonds set to each shouler, with tapered D-section platinum shank, hallmarked platinum London, bearing the Bentley & Skinner sponsor mark, gross weight 3.4 grams

No. 21147M