Antique Platinum and Diamond Ring

Centering on two old European cut diamonds (5.5 - 5.6 x 3.34 mm; 5.5 - 5.5 x 3.28 mm) weighing approximately .66 carat (K color, VS2 clarity) and .63 carat (K color, VS2 clarity), the milgrain mount with engraved and scroll detailing and with single