Description:1966 Bill Russell twice autographed personal check (PSA/DNA 9 MINT). September 19, 1966 dated counter check has been signed "William F. Russell" on the front with "Bill Russell Enterprises" written above (providing additional autograph). Encapsulated by PSA/DNA with special "Russell Collection" pedigree labeling and includes certificate of provenance from Bill Russell: PSA/DNA (9 MINT)