Like any mechanism, a watch movement only uses a small percentage of its energy productively. Friction, air resistance and all kinds of losses take a considerable toll on the available power. Thus inside the watch case, 75% of the energy supplied by the spring is wasted ! Following on from Cartier ID One, Cartier decided to design Cartier ID Two, a second concept watch this time aimed at improving the efficiency of a watch movement. The objective consisted of increasing stored energy by nearly a third and reducing energy consumption by half for a constant volume. Once again, the Maison’s watchmakers started with a blank sheet and came up with some never-before imagined solutions: new materials, novel manufacturing techniques and totally innovative design choices. Today this second Cartier concept-watch opens up new technological prospects which open the way to miniaturization, to previously inaccessible functions and a performance level never attained till now. Carter ID Two already beats out tomorrow’s time…
Inside a watch case a mind-boggling 75% of the energy is wasted through various friction and from air resistance. The case may be airtight but inside it each moving part, however small, undergoes aerodynamic pressure which dampens its movement. After examining the technical possibilities for improving the air penetration coefficients, the team at the Manufacture’s research and development laboratory had a brainwave: “What if, instead of trying to mitigate the consequences of aerodynamic pressure, we removed the cause ?” In other words : getting rid of the air ! Despite its apparent extreme simplicity, this revolutionary solution brought with it some equally extreme technical difficulties. To avoid the risk of leaks, the engineers had to design a case in just two parts, without any screws whatsoever. The seals between the case block and the back as well as those surrounding the setting crown have been made more airtight by the addition of nanoparticles. At the heart of Cartier ID Two, the movement beats freely inside a ceramic case whose perfect transparency reflects the absolute vacuum it houses. And in the absence of all aerodynamic resistance, it can develop considerably more energy than traditional watches.