A group of four signed colour photographs of world heavyweight champions: Muhammad Ali, George Foreman, Larry Holmes and Ken Norton, all with a COA to

A group of four signed colour photographs of world heavyweight champions: Muhammad Ali, George Foreman, Larry Holmes and Ken Norton, all with a COA to the back of the frame, all signatures in marker pen, well presented, similar sizes, the largest (Ali) 28 by 33cm., 11 by 13in.