David Montgomery, star running back for the Detroit Lions, has hand signed this Lions Riddell SpeedFlex Midi helmet at a private signing. This is Riddell's new mid size helmet that is between the size of a full size helmet and a mini helmet. This item is authenticated by Beckett Authentication Services and was signed in the presence of one of their representatives. Their tamper-evident hologram featuring a QR code and serial number is on the item. The authenticity can be verified online by entering the serial number or scanning the QR code.Item pictured may not be the exact item you will receive. It will be similar quality, and we guarantee your satisfaction.