The blue ink kind of looks like those old school printed on photo signatures but it does look like his real signature. It's good as long as it's live ink. If it is the printed on signatures it will have a real rough looking appearance, with dots/skips and tiny white dot discoloration in the "ink." But from the image about it doesn't appear to be that.
Hi Jason thanks for advising, closer inspection shows the ink to be fairly smooth, not that rough and not much in the way of imperfections. Hopefully it's the real deal then.