1920s Black Enamel Halo Diamond Ring 14K Yellow Gold

This storied circa 1920s 14K yellow gold ring is centered with one (1) old European cut diamond set into a platinum bezel that is bordered black enamel. The ring measures 10.4mm at the top, rises 3.3mm above the finger, tapering to 1.9mm wide and 0.7mm thick at the base of the shank. It currently fits a size 4.25. Please note that there is some wear on the enamel, and the ring is a bit oblong from a previous resizing.