"Mechanic since I was a lad, clock-maker since I came to my senses," said Saturn. "The piece of information you are wanting, Doctor, is this: this here is an old Hooke balance-spring watch, this is. When the Master made it, why, it might’ve been the best time-piece ever fashioned by human hands. But now there’s a score of proper horologists round Clerkenwell who can make ones that’ll keep better time. Technology ages, dunnit?"