JSA Certification # BB52376. Slab Dimensions : 9 inches x 12 inches. Beckett Authentication Services was established in November of 2016 to provide an autograph authentication service that will be the most trusted and respected in this industry. Led by the two top autograph authenticators in the world, Brian Sobrero and Steve Grad bring their years of autograph experience to form the newest member to the Beckett team. Grad most…