I dug this today in Central Virginia out of a Union camp. It is made of lead. It is about 1.5" wide, 1.5" tall and generally rounded with a flattened base. There looks to be a carved slot in the top. First thing I thought was an artillery fuse. Second though was a lead box. Third guess is simply a camp carving of a faux box. I do not think it coms apart. Ideas?