edit: old post, poster was last here feb. 2022,so prob won't see new reply's
it's hard to see the nail clearly in pic, here is a link that might help with age
Antique Nails: History & Photo Examples of Old Nails Help Determine Age of a Structure We give a chronology: the history of nails, types & methods of fabrication, and we describe antique and modern cut nails focusing on tree nails, wrought nails, and cut nails used in wood frame construction or...