Riddell Packers Speed mini helmet hand signed by Packers Super Bowl XLV Champ CLAY MATTHEWS. The signature is in Black Sharpie with the inscription “GBP HOF 2024”. This item was signed at a private signing with us and would make a great addition to any Packers collection! This autograph is guaranteed to be 100% authentic and will include a COA from JSA (James Spence Authentication).