Brands guard their image like it's the last thing standing between them and irrelevance. Then Audemars Piguet, a brand that makes fewer than 50,000 watches a year at an average price north of thirty thousand dollars, decided to team up with Swatch, the company famous for plastic watches you could buy with pocket change as a teenager. In practice, it turned into one of the controversial, most talked about launches the watch world has seen in years