The Rotonde de Cartier is a classic design from the brand, featuring a round case and straight lugs that are true to Cartier's signature style. This collection is known for its watches with added complications. One standout piece is the Rotonde Mysterious Hour, which pays tribute to Cartier's history of 'mysterious' clocks. This watch has a white gold case adorned with 183 baguette-cut diamonds, a beaded crown with a brilliant-cut faceted diamond, and a rhodiumized 18K white gold dial with 182 baguette-cut diamonds. The bracelet is also studded with 442 brilliant-cut diamonds for a total of 37.26 carats.