This is a door knocker ring that demands your attention! It is not marked for metal content but tests positive for sterling ( acid test and guaranteed ). It has makers marks WK. Most likely made in Asia in the 1930's, this ring has a beautiful light green jade cab that 17.5mm by 22.5mm that is surrounded by bead set pastes. The head of the ring measures 27mm by 29mm. The metal work is top notch even the underside has fancy wirework next to the jade. Every angle has beauty. This ring is currently a size 5 1/4 In very nice condition.