Authentic antique cast iron cannonball, measuring 4.19 inches in diameter and weighing approximately 11 pounds. Based on size and weight, this is consistent with a 6-pounder smoothbore solid shot, used from the 1700s through the American Civil War. Era: Likely 18th or 19th century. Or European battlefield or military surplus. Condition: Great original patina with surface aging, pitting, and darkened rust. No visible drill holes - appears solid and inert. Ideal for display, historical education, or antique arms collection.