2 3/4″ high x 2 1/8″ wide x 3/4″ deep (Actual: 2.719″ high x 2.129″ wide x .736″ deep). Brass body. Steel shackle. Some shackles have been seen nickel plated. Warded. Swing shackle without shackle toe case cut-out. “Louisiana Purchase Exposition” was the title of the 1904 St. Louis Missouri World’s Fair.