I too would love to see a photo of the hallmark as it has me wondering if what she interprets as a "side ways C" and such could be a sickle and hammer mark?
Kerigan, Simply gorgeous! Can you upload photos of the mark? There is a page you might be interested in reading on Antique Jewelry Investor about white gold and the introduction and popularity of white gold wedding bands in the production of jewelry.
Really, this heirloom antique wedding ring, is appraisal worthy! We have a wonderful team of jewelry professionals we work thru who provide accurate & timely expert appraisals and expert opinions on-line.