Description:Stan Coveleski single signed baseball c.1960s J.DeBeer and Son "Vigorized" baseball has been signed "Stan Coveleski" just off the sweetspot in ink rating 7/8-8 out of 10. Ball displays mild toning to a clear coat applied years ago to aid in preservation. Includes auction LOA from JSA and letter of provenance from the Kennedy Family: Sig. EX/MT-NM, Ball EX