This Autographed Alternate AMP Speed Mini Helmet has been Personally Signed by Curtis Martin of the New York Jets. This item is 100% Authentic and comes with a PSA/DNA Certification Card and a matching numbered Hologram. This is a PSA in the Presence Authenticated item which means a PSA representative was present when this item was being signed. This is a stock item. We conducted an autograph signing with Curtis Martin and we have several of these available. The one you will receive will be of equal quality to the one pictured. This item can be verified through PSA/DNA Itp.