Montblanc continues with their journey to explore the Seven Summits with this year’s release. This release is on Mount Elbrouz, the highest mountain in Russia and Europe. This novelty is based on the 1858 Geosphere 0 Oxygen series. Here is a quick take based on a hands on we had with the watch recently.
This watch was release prior to Watches & Wonders Geneva 2026. Availability is from June 2026.
Quick takes: Montblanc 1858 Geosphere 0 Oxygen Mount Elbrouz Limited Edition 829
The Montblanc 1858 Geosphere 0 Oxygen Mount Elbrouz Ref. 136353 retails at EUR 10,100 / SGD 14,000 inclusive of local taxes. Limited Edition of 829 pieces.
Mount Elbrouz
Mount Elbrouz is a dormant stratovolcano rising 5,642 m above sea level, and is the highest volcano in Eurasia, as well as the tenth-most prominent peak in the world. Elbrouz has two summits, both of which are dormant volcanic domes. The taller, western summit is 5,642 metres (18,510 ft); the eastern summit is 5,621 metres (18,442 ft).
The case, dial and hands
The case shape chosen is of course, the 1858 Geosphere case as this novelty is part of the collection. The case is a three part construction, with the case upper and lower case in titanium. The case middle is a proprietary composite of aluminised basalt fibres, CaCO3 (calcium carbonate), and a bio-sourced resin containing 30% vegetable matter. The case measures 43.5mm and has a water resistance rating of 100m.
The case middle looks like a kind of white marble with dark speckles. The feel to the touch is smooth and cool. On the side is engraved the profile of the Ebrouz’s twin peaks and infilled with lume.
The watch case is also equipped with Montblanc’s 0 Oxygen Technolog. The 0 Oxygen Technology is a process where the movement is assembled and hermetically sealed inside an oxygen-free, nitrogen-filled chamber. This prevents the internal metal parts from oxidizing over time and eliminates fogging caused by drastic temperature changes during extreme high-altitude or deep-dive conditions. This has been used in other Montblanc watches before.
The bezel is also in titanium, with a light grey anodised aluminium insert with lume on the cardinal markers. It is bi-directional rotating and features a knurled edge for ease of manipulation with gloved hands.
And the dial sports the usual Geospheres design and layout. Two spheres depict the map of the landscape and colours of the mountain. The colour of the dial is in a white and brown sfumato finish over a glacier-patterned base. Like other Geospheres, the dial features vintage elements like the elongated cathedral hands and the railway minutes track.
The movement
The movement is Montblanc’s Calibre MB 29.25 world timer. The movement is based on the Sellita SW 300-1 base with the world timer complication module developed at its manufacture in Villeret (Minerva). This is the standard movement used in the Geosphere collection. The movement is automatic winding with 42 hours of power reserve. And the dual hemisphere seen on the dial shows the world time. It drives two hour hands, one on the main dial, and the other on the sub-dial at 9 o’clock to show dual timezones. Both are independently adjustable in 1 hour increments.
The finishing of the movement is not observable as the case back is closed. And engraved on the case back is the profile of the double peaks of Mount Elbrouz in 3D relief engraving. This is done by laser and is in full colour. The Seven Summits are also engraved with other verbiage around the center piece of the case back.
Concluding thoughts
The watch looks rather attractive, and wears smaller than the 42.5mm x 13mm case dimensions would suggest. But make no mistake, this is not a small watch by most counts. This is a rugged and hardy tool, not designed for the boardroom, but to roam the world. Be it in the urban jungle or better yet, in the mountains where it is designed to live.
For those who yearn to climb the peaks, the Geosphere 0 Oxygen series is a compelling proposition. And for those who marvel at the peaks of Mount Elbrouz, this watch is a tribute to mountain.
