Historic and dramatic 8.5 x 8.75 cardstock photo of Marciano knocking out Jersey Joe Walcott for the heavyweight title on September 23, 1952, signed in black felt tip below the image, “Rocky Marciano.” A few very subtle surface impressions and trimming to bottom edge (slightly touching loop of “y” in Marciano’s first name), otherwise fine, crisp, bright condition. LOA Steve Grad/PSA/DNA and R&R COA.