The signature has been Certified By Steiner Sports Memorabilia, inc. With a Letter of Authenticity. The Game Used Base has been Certified by MLB Authentics which features a unique number which can be verified by the MLB Online Database.Second Base Used 6th and 7th innings, with signs on each side (The Final Season in reference to the original Stadium) New York Yankees and MLB I Live For This, Anchor has been removed. Derek Jeter Picture as an addition with Base will be also sent. This item is in the category "Sports Mem, Cards & Fan Shop\Autographs-Original\Baseball-MLB\Balls". The seller is "artmar4714" and is located in this country: US. This item can be shipped to United States.