The 1970s were a turbulent time for the watch industry. Switzerland’s prestigious old guard watchmakers were shuttering in the face of a battery-operated revolution. Sales of inexpensive quartz watches from Japan were soaring. In search of a strategy to stay relevant amid this radical shift, the holy trinity of Swiss watchmakers—Audemars Piguet, Patek Philippe, and Vacheron Constantin—all came up with the same Hail Mary play: a watch with sporty looks and made of steel for everyday…

