Chanel’s first timepiece, the Première, was unveiled in 1987. It reflected some of Coco Chanel’s most enduring symbols: the octagonal case is in the shape of the stopper on the Chanel No. 5 perfume bottle, and the chunky gold chain resembles the designer’s handbag straps. Now, Chanel’s signature watch has been unveiled in new styles, including a diamond covered model ($28,500) with 56 snow-set diamonds, a technique that paves the watch’s surfaces with stones of varying sizes. Other new variations include a mot…