2 3/4″ high x 2 1/8″ wide x 3/4″ deep (Actual: 2.798″ high x 2.121″ wide x .738″ deep). Brass body. Steel shackle. Some shackles have been seen nickel plated. Warded. Swing shackle with case shackle toe cut-out. “Louisiana Purchase Exposition” was the title of the 1904 St. Louis Missouri World’s Fair.