I’ve got vintage glass with white inclusions, some quite large. Paul comments on the tool marks and I don’t really think the base wear proves anything other than its worn and wasn’t made yesterday?
Not that there’s anything wrong with it but it doesn’t strike me as an heirloom type object to be handed down and treasured and wrapped in tissue but more something utilitarian that was kept to be used (assuming it’s 200 odd years old).
Has it got much wear other than on the base? I would expect there to be plenty of nicks and scratches on the outside, not just the base. If it was glass for the table such as a salt, I think I there to be wear on the rim, from being stored upside down when not in use. Also probably scratches and staining or dullness on the inside?