Earl Campbell HOF 91 Autographed Authentic Oilers Mini Helmet JSA COA. Signed with a black sharpie on an Official Authentic Riddell Houston Oilers Mini Helmet. Earl Campbell has added his HOF 91 inscription to the mini helmet. You will receive a numbered COA from JSA. The mini helmet has the matching JSA numbered sticker attached. This autographed Mini Helmet has been stored in its original box since the signing. Shipped with USPS Ground Advantage. I ship internationally through the eBay International Shipping Program.