The Montblanc 1858 Geosphere 0 Oxygen South Pole Exploration Boutique Exclusive is powered by Montblanc’s automatic movement with a Manufacture Worldtime complication – the Calibre MB 29.25 – that indicates the time around the world with day/night displays, a dual time, and a date. The timepiece is housed in an ultralight 42mm titanium case completely devoid of oxygen and comes with an iced blue sfumato dial and matching coloured bi-directional anodized aluminium bezel. It is available with an interchangeable tapered bracelet with a fine adjustment system and a grey textile strap with a rope pattern. On the caseback, is a 3D laser engraving of the Aurora Australis.