The Case for Cartier: Inside the Santos Legacy

Before 1904, a gentleman kept time in a pocket watch. Louis Cartier changed that for his friend, the aviator Alberto Santos-Dumont, who needed to check his speed mid-flight without letting go of the controls. The result — a square case, exposed screws on the bezel, a leather strap — was one of the first wristwatches designed for men, and its silhouette has barely aged in over a century.

That's the quiet trick of the Santos: the visible screws that look decorative today were structural necessities in 1904, holding the crystal to the case. Cartier kept them anyway when the engineering no longer required it, because by then they were the point. It's a reminder that the best design decisions often start as constraints.