A unique way to celebrate your father's birth year or an anniversary or just a favorite number. Authentic weathered nails are precision milled by hand to create a post style cuff link. These special & unique nails were used by industry as they had the year embossed in the nailhead and were driven into railroad ties as well as utility poles, bridge timbers and other wooden structures. They were used to mark the year of installation and now serve as a record of 20th century progress. Most are steel, though many are copper, aluminum, malleable iron, or brass. Years 1930 through 1969 are available.