Lew,
If you'd have posted a month ago, I'd have suggested driving down to Sanford for the Southern SxS Classic. Lots of knowledgeable vendors and sellers, some even from England, who would be qualified to handle the gun in person and opine.
I think the online appraisals you'll get here are just as good as what you will find locally in central NC. Perhaps Cherry's Guns in Greensboro would be willing to give you an appraisal, and while they have a lot of old guns, they are not fine SxS specialists.
