American Civil War era Williams "Cleaner" bullet, type III, used in muzzle-loaded rifled muskets. The bullet is made out of lead with a "plug" made from a zinc pin and flat, circular base; the overall shape of the bullet is conical with a slightly rounded top; there are two grooved rings around the base and another two around the tip and shoulder. There are two notable scratches next to one another on the "plug", one of which extends up slightly into the lead base of the bullet, the other is wider and deeper, but does not extend off of the zinc. There is a white patina (lead carbonate) beginning to form on the surface of the bullet, this is most frequently caused by long-term exposure to carbon dioxide and is a normal sign of age in lead objects.