The Montblanc 1858 product line is inspired by the professional Minerva watches from the 1920s and 1930s, which were conceived for military use and exploration. Reinterpreting these legendary timepieces, the Montblanc 1858 product line expresses the spirit of mountain exploration, embodying the modern trend of returning to nature. The Montblanc 1858 Geosphere is dedicated to the world’s Seven Summit mountaineering challenge, the holy grail of mountaineering adventures. It comes in a 42 mm titanium case combined with blue and contrasting icy white design details, finding inspiration in the colors of glaciers. The timepiece features a manufacture worldtime complication developed by the Montblanc watchmakers in Villeret: two domed globes turning in opposite directions, which complete a full rotation in 24 hours. Both are surrounded by a scale with the 24 time zones, along with a day and night indication in contrasting colors. This provides an instinctive way of appreciating the different time zones, aided by SuperLumiNova® applied to the continents for increased visibility and performance at night. The timepiece is finished with a vintage bi-material technical bracelet made of matt, satin-finished titanium and polished stainless steel.

CASE

Material: Titanium

Width: 42mm

Dial: Blue dial with white luminescent Arabic numerals and indexes

Bezel Type: Bi-directional turning bezel

Bezel Material: Steel - ceramic

Case Back: Solid, engraved with the emblematic Mont Blanc mountain, a compass and two crossed ice pick-axes, as a nod to the spirit of mountain exploration

Crystal: Domed sapphire crystal with anti-reflective coating

Strap: Titanium and stainless steel bracelet, satinated and partly polished

Clasp: Push Button Folding Clasp

Crown: Fluted in titanium with Montblanc emblem in relief

Numerals: Arabic

MOVEMENT

Caliber: MB 29.25

Mechanism: Automatic, self-winding

Jewels: 26

Power Reserve: 42 Hours

Balance frequency: 28’800 vibrations per hour

Functions: Hours, Minutes, Worldtime with turning northern and southern hemisphere globes, 24-hour scale and day/night indication; Dual time indication; Date by disc

Water resistance: 10 bar (100 m)

REF: 125567