Muhammad Ali Cassius Clay dual signed book page BGS slab JSA LOA

Roughly 5 by 8 1/2 inch light brown page cut from a hardcover book autographed in black ballpoint pen by the late legendary heavyweight boxing champion Muhammad Ali and he also signed his former name Cassius Clay larger below. This is an rare vintage fully legible, every letter double signature of the Greatest. Authenticated by JSA with their Letter of authenticity and slabbed by Beckett Grading Services in a jumbo 9 1/2 by 13 inch slab. ONLY ONE AVAILABLE FOR SALE.