Bill Walton autographed Portland Trail Blazers 1970s NBA Playoffs ticket BAS slabbed

Original Portland Trail Blazers NBA Playoffs ticket (undated but from definitely from the late 1970s) autographed in blue Sharpie by legendary center Bill Walton. Authenticated and slabbed by Beckett Authentication Services with the autograph graded a perfect 10. Has minor edge wear. ONLY ONE AVAILABLE FOR SALE.