I could speak at length about design language. The watch I wear has been made by five different companies at three price points over the past 70 years.
The motion of the Automate Fee Ondine was done by Pierre Junod, who is a master badass.
The other acknowledged master of automata is a friend of mine. She taught me guilloche.
I have another friend who made most of his money as a "paper engineer" - as in, he designed pop-up books. It was this connection that got him hooked up with Brian Selznick when Brian was busy trying to help the Franklin Institute restore The Maillardet. As a result Andy got to spend two weekends getting the thing presentable for the bicentennial... and ended up being the model for Hugo's dad.