Grade not disclosed by the source; the edge points at the grade-unknown execution.
Watch model
Montblanc 1858 Geosphere Chronograph 0 Oxygen
Montblancgrain: modelref. 132303
no sourced photograph
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See Montblanc 1858 Geosphere Chronograph 0 Oxygen on the cited page ↗
Movement
Sources
- 1Monochrome Watcheshttps://monochrome-watches.com/montblanc-1858-geosphere-chronograph-0-oxygen-reinhold-messner-limited-edition-red-dial-review-specs-price/presstier 2retrieved 2026-08-251 fact on this page