Solomon Thomas, former All-American defensive tackle for the Cardinal, has hand signed this Stanford Riddell Speed full-size replica helmet at a private signing. This item comes with a certificate of authenticity (COA) from Signature Sports Marketing, one of the leaders in the industry. You will receive a paper COA along with matching serial-numbered holograms.Item pictured may not be the exact item you will receive. It will be similar quality, and we guarantee your satisfaction.