Designed in 1972, at a time when a luxury watch made of steel was still a radical concept, Audemars Piguet’s nautical-inspired Royal Oak captured the “stealth wealth” style of the moment, mirroring the cutting-edge ethos of the French fashion scene (think: Hubert de Givenchy, Yves Saint Laurent, Emanuel Ungaro, Pierre Cardin), as well as the era’s groundbreaking architecture, such as Richard Rogers and Renzo Piano’s inside-out postmodernist Pompidou Centre in Paris, completed in 1977. “To me, the Royal Oak is a work of art that happens to be a watch,” says British GQ editor Bill Prince, author of the new book Royal Oak: From Iconoclast to Icon (Assouline), coming out October 12. “It’s one of those works of culture that has managed to cut through time, in the sense that it was born of an era, but it already had the criteria to be bigger than the era.”