Montblanc 1858 Geosphere

by Montblanc

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 blue Sfumato calfskin leather strap with white stitching.

MOVEMENT

Movement CaliberMB 29.25

Power42,0 h

Frequence28800,0/h

4 Hz

26 Jewels

Movement Screw BalanceNo

Balance springFlat hairspring

COMPLICATIONS

IndicationsHours, Minutes, Second time zone, Hand-type date

ComplicationsWorldtime with turning northern and southern hemisphere globes, 24-hour scale and day/night indication; Dual time indication; Date by disc

CASE

Case MaterialTitanium

BezelBi-directional turning bezel

Anti-Scratch CrystalYes

Crystal ShapeDomed

Crystal DescriptionDomed sapphire crystal with double anti-reflective coating

Crystal TypeSapphire

CrownFluted in titanium with Montblanc emblem in relief

Distance Between Horns22 mm

Bezel FinishMicrobille-Poli

Water Resistant10 bar (100 m) bar

Case Diameter42 mm

Bezel MaterialSteel - Ceramic

Accredited Gem Lab ®

We have the equipment required to perform gemological testing and appraisals set forth by the American Gem Society.

Conflict Free

We only purchase diamonds through the most respected suppliers who, like us, proudly adhere to and enforce the standards established by the Kimberley Process.

Recycled Materials

Our fine gold and silver has been certified as being from 100% recycled sources by SCS Global - a third-party certification, verification and validation service.