A platinum and diamond bombe ring, with a central row of three old-cut diamond collets, approximately 0.54cts total, within a spiral pierced and millegrain set surround of rose diamonds and two round brilliants, to a tapering shank, indistinct mark ‘Pt(?)’, size M+, 6.3 grams. 3 Diamonds 3.9mm. 2 @ 3.4mm. RB’s 2.5mm.