Inspired by mountains and the courageous mountaineers who dare to conquer them, the Montblanc 1858 Automatic Chronograph 0 Oxygen The 8000 is a true tribute to adventure and exploration. Housed in a 42mm stainless steel case completely devoid of oxygen, this timepiece offers several advantages for intrepid explorers. By eliminating fogging and preventing oxidization, the movement can last far longer with greater precision. Powered by the MB 25.13 automatic chronograph, this timepiece boasts impressive functionality and accuracy. The case back is engraved with the “Spirit of Exploration” pattern, a reminder of the courage and tenacity required to conquer the world's highest peaks.