Honestly, I was surprised when Dufour was telling his early history and how he didn’t like/wasn’t good at maths. I had assumed a deep appreciation of maths (and to an extent physics) and skill was a common feature of watchmakers. But that’s probably a biased/elitist, academic perspective on things, since just because he didn’t do well in classroom tests does not mean he lacks an inherent/natural understanding and facility with maths that is reflected in his complex and precise creations…which is really impressive to think about.