Riddell Proline On-Field Authentic University of Texas Helmet autographed on the right side in black marker by Earl Campbell, who added the inscription “HT 77″ after his signature.

Campbell won the Heisman Trophy in 1977 while playing for the University of Texas.

This is an older, better version of his signature (which is shaky now).

Sold with  Certificates of Authenticity from The Autograph Source and independent third-party authenticator PSA/DNA.