And would this be the Sevres mark? And well provenanced? May I suggest auction sites such as Sothebys, or Skinner or equal? access their sites and follow instruction for appraisals. My understanding, too, is that there were other fine porcelain sites that presented the couple with dinnerware. A cursory search did turn up a set of Sevres plates with the Napoleon backstamp that I think would have come after the wedding itself - but that same era - 6 dinner plates for $3,500. KB