The Steel Curtain was the nickname given to the front four of the famous defensive line of the Pittsburgh Steelers during their 1970s dynasty years. This defense was the backbone of the Steelers dynasty, which won 4 Super Bowls (IX, X, XIII, and XIV). This is a hand autographed Pittsburgh Steelers Steel Curtain Riddell NFL Authentic TB Mini Helmet. Four hand signed signatures: Joe Greene, Dwight White, Ernie Holmes, and LC Greenwood. Bold gold signatures as shown. Mounted Memories Certificate Card of Authenticity. Image of actual item in stock - as shown