This autographed full size Riddell replica Eclipse Alternate helmet has been personally hand-signed by The Purple People Eaters, the nickname given to the Minnesota Vikings defensive line from the late 1960s to the late 1970s. Carl Eller, Jim Marshall, Gary Larsen & Alan Page all signed this helmet. These autographs are certified by Beckett Authentication Services (BAS) Witness Certification. That means that a Beckett representative was present when this item was signed. It comes with the numbered authentication hologram with a QR code that verifies the authentication on the Beckett website.