he had actually been worried about the number of cogs, even though he did not think it was that important. He made his design mechanically correct not because he thought that was better but, rather, to avoid angry e-mails. When the Royal Mint turned Bruce’s plate-sized design into an actual coin only 28.4 millimeters across, they had to lose some of the finer details, and three cogs were the victim of this simplification.
