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The Montblanc 1858 Geosphere draws its lineage from the legendary Minerva military watches of the 1920s and points it directly at mountaineering, dedicated to the Seven Summit challenge. Calibre MB 29.25 powers it automatically with 42 hours of power reserve at 28,800 vph.

The Montblanc 1858 Geosphere draws its lineage from the legendary Minerva military watches of the 1920s and points it directly at mountaineering, dedicated to the Seven Summit challenge. Calibre MB 29.25 powers it automatically with 42 hours of power reserve at 28,800 vph.