there are a few FR makers to choose from so would need to see the mark to be able to give an answer. You can upload an image of the mark in a follow-up submission.
Hi the initials "FR Co" will be the maker's mark. Before we do any kind of research could you please inform our researcher, if the ring is an antique engagement ring or not? The forum on Antique Jewelry Investor is dedicated to Antique Jewelry Hallmarks.
Best Regards Antique Jewelry Investor Support Team
