Launched in 2013, the Tourbillon Water includes the new in-house ATC11 calibre movement which is made up of 184 parts and includes double spring barrels and 24 jewels. The watch also has a 10 day power reserve. Beating at 18,000 vph the movement is housed in an 18ct white gold case which measures 43.40mm in diameter and includes a sapphire crystal on the front and back, complete with anti reflective treatment. I like the design. It has the illusion of being oblong when it fact it is not.