This lot is accompanied by a hand signed LOA from "Dr. J's" son Julius Erving III"I am writing this letter to attest to the authenticity of this game-used basketball that was presented to my father, Julius Erving, on January 15, 1981 after he scored his 20,000th career point. The basketball was personally given to me by my father and has remained in my possession until now. I hope it makes a great addition to your collection."