The 1970 picture is of Iory (Iowerth) Jones. Usually he was seen with a thinning head of hair but occasionally earlier in his career with a full head of hair and one imagines he had some temporary "enhancement" in that area - he wasn't the only referee to do so in that era. The referee called Ron Jones was a much more junior official and as far as I know never refereed a European match although he was on the line a number of times. The reference to "Ken" Jones is a mistake.