The Montblanc 1858 Geosphere 0 Oxygen Mount Elbrouz Limited Edition 829

Many of the overtly vintage design cues of Montblanc’s 1858 collection are inspired by Minerva’s military watches from the 1930s, renowned for their precision and legibility in extreme conditions. Promoted as rugged, reliable companions for mountaineering and outdoor adventures, the 1858 Geosphere combines its retro looks with a worldtimer featuring two rotating globes depicting the Northern and Southern Hemispheres. Tapping into the theme of mountaineering and exploration, the latest Geosphere is dedicated to Mount Elbrouz (Elbrus), Europe’s highest mountain, a dormant volcano. Equipped for the high-altitude mission, the monochromatic Geosphere has an oxygen-free case with volcanic ash fragments.

Montblanc and mountaineering go hand in hand, and the Seven Summits, the highest mountains on seven continents, are pinpointed on the maps inside the two rotating globes. Following the recent Mount Vinson edition, Montblanc dedicates this 1858 Geosphere to Mount Elbrouz. Beyond the realistic 3D laser colour engraving of the mountain on the caseback, many other features reference the famous mountain.

The 43.5mm titanium case, with a thickness of 13mm and 100m water-resistance, features a middle case made from a highly unusual and proprietary composite of volcanic ash, aluminised basalt fibres, calcium carbonate and bio-sourced resin. To handle high altitudes and extreme temperature fluctuations, the case is sealed in a nitrogen-filled, oxygen-free environment tank to prevent moisture ingress and protect it from fogging. The bidirectional rotating compass bezel, with its grey aluminium insert, can be used to gauge true North and features a classic coin-edge grip. Viewed in profile, the mottled composite middle case is engraved with the outline of the twin peaks of Mount Elbrouz and hand-filled with white orange-emission Super-LumiNova.

The landscape and colours of the mountain are interpreted on the dial, with its glacier-patterned base and brown-and-white sfumato finish. Like other Geospheres, vintage features like the elongated cathedral hands and the railway minutes track pay homage to Minerva’s 1930s watches. However, there are plenty of contemporary touches too, like the white luminescent accents on the hands, hour markers and bezel markings that also emit an orange glow in the dark.

The worldtime complication at the heart of this watch features two rotating hemispheres with continents depicted in relief, with a black line representing the Greenwich meridian and eight black dots indicating the Seven Summits and Mont Blanc. The worldtime function is indicated on the two domed globes, rotating in opposite directions over 24 hours. Each globe has a 24-hour scale and a two-tone day/night indicator. For a more immediate consultation, there is a handy sub-dial at 9 o’clock that can be used to track a second time zone (home time), set via a pusher that advances the hand in one-hour jumps. The date aperture, calibrated to follow the time on the main dial, is at 3 o’clock. In contrast to the orange lume used elsewhere, the continents and the second time zone hand glow blue.

The Montblanc 1858 Geosphere 0 Oxygen Mount Elbrouz is powered by calibre MB 29.25, a Sellita SW 300-1 base (clone of the ETA 2892) with the worldtime complication module developed at its manufacture in Villeret (Minerva). This automatic movement operates at 28,800vph and has a power reserve of 42 hours.

Matching the earthy colours of the dial, the watch is presented with two interchangeable rubber straps: one light brown and the other ivory. Limited to 829 pieces, a nod to the year 1829 when the highest peak was first summited, the watch retails for EUR 10,100. More information at montblanc.com.