An oval ruby and diamond cluster ring

An oval ruby and diamond cluster ring, the oval-cut faceted ruby weighing 1.38 carats, claw-set to the centre of a millegrain-set old brilliant-cut diamonds cluster, in platinum with yellow gold D-section shank, hallmarked 18ct gold, London, 2017, bearing the Bentley&Skinner sponsormark, gross weight 3.6 grams