Green Bay Packers Throwback Mini Helmet hand signed by former Green Bay Packers running back JIM GRABOWSKI. The signature is in black sharpie and includes the inscription "SB I & II Champs". Grabowski was a member of the Packers Super Bowl I and II Championship Teams!. This item was signed at a public signing and would make a great addition to any PACKERS collection! This item is guaranteed to be 100% authentic and will include a Certificate of Authenticity from JSA authentication.