The Montblanc 1858 Geosphere 0 Oxygen Limited Edition has no oxygen at all, which improves the performance and accuracy of the watch over time, even in some of the most demanding mountain environments. The absence of oxygen inside the movement not only eliminates fogging, which can occur with drastic temperature changes at high altitudes, but also prevents oxidation. With no oxygen, all components last much longer and provide better accuracy over time. The watch is presented in a 42 mm bronze case with a bi-directional knurled ceramic bezel with luminescent cardinal points and the Maison’s glacier motif dial. The watch is powered by the MB 29.25 automatic movement with manufacture complication. Like the other 1858 Geosphere models, the northern and southern hemispheres are represented by two three-dimensional globes with day/night indication that allow users to see the different times around the world at a glance.