Art Deco Geometric Diamond Trilogy Ring, 18k Gold Diamond Engagement Ring Approx. Size US 6.5

This striking geometric ring is c.1940's. 18k gold band with a Platinum setting holding three diamonds. The center stone measures 1.9mm the two tiny rose cut diamonds on the sides measure approx. 1.1mm, the stones are slightly grey in colour with a visible inclusion in the center stone. The setting holding the stones measures 13mm x 4mm. The width of the cross over shoulders is 6.8mm The band is 1.8mm in diameter, only very slight misshaping through natural wear. The markings are obscured...