Montblanc 1858 - GEOSPHERE ULTRABLACK | 128257

The Montblanc 1858 product line is inspired by the legendary professional Minerva watches from the 1920s and 1930s, which were conceived for military use and exploration. Reinterpreting these historical timepieces, the Montblanc 1858 product line expresses the spirit of mountain exploration, embodying the modern trend of returning to nature. The Montblanc 1858 Geosphere UltraBlack is dedicated to the world’s Seven Summit mountaineering challenge, the holy grail of mountaineering adventures. It comes in a 42 mm distressed stainless steel case combined with black and contrasting white design details. The timepiece features a manufacture world-time complication developed by the Montblanc watchmakers in Villeret: two domed globes, turning in opposite directions, that 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 luminescent continents for increased visibility and performance at night. The timepiece is completed with a black calf leather strap with beige stitching.

Limited edition of 858 pieces

CASE

Material: Distressed stainless steel

Width: 42mm

Dial: Black dial with beige luminescent Arabic numerals and indexes

Bezel Type: Bi-directional turning bezel

Bezel Material: Steel - ceramic

Case Back: Solid

Crystal: Domed sapphire crystal with anti-reflective coating

Strap: Black calf leather strap with beige stitching

Clasp: Stainless Steel Pin

Crown: Fluted distressed stainless steel 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: 128257