Description:1971 Red Auerbach autographed letter to Bill Russell with jersey number retirement content (PSA/DNA 8 NM-MT) August 10, 1971 dated typed letter on Celtics stationary has been signed "Red" at the close. Content reads in part, "...Please choose a date so that we can retire your number. I am sure the event will go well and to you complete satisfaction...". Encapsulated by PSA/DNA (8 NM-MT) with special "Russell Collection" pedigree labeling and includes certificate of provenance from Bill Russell: Letter: EX/MT, Signature: NM-MT