Cameo ring 14kt with Circled "C" and hallmark

United States
December 19, 2006 6:09pm CST
The ring was listed as Vintage. The hallmark is 3 verticle lines that resemble grass blades. Left mark curves up and right , Middle line is verticle.Right line curves up and left. All 3 have a dot or period mark at their top. The 14kt has a dianomd shape with adc or abc inside. Any info would be thankful.
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