In 1920, a 400 pound ball made entirely of wrought iron replaced the original. In 1955, the iron ball was replaced with an aluminum ball weighing a mere 200 pounds. This aluminum Ball remained unchanged until the 1980s, when red light bulbs and the addition of a green stem converted the Ball into an apple for the "I Love New York" marketing campaign from 1981 until 1988. After seven years, the