That is just gorgeous! I know nothing about evaluating old quilts. There is a local Quilt shop here in NH that used to have Gerald Roy come in once a month for appraisals. If you live anywhere near New England that would be an option. Or, is there a quilt museum any where near you or a local Historical Society? That may be another source of information. One other thought is sending the New England Quilt Museum in Lowell Massachusetts an email with your photos and ask them.
Is it hand sewn together or machine pieced?
Please let us know what you learn and what you decide!!!