Montblanc 1858 Geosphere Chronograph 0 Oxygen The 8000 LE 290

Technical specifications


  • Hours
  • Minutes
  • Seconds
  • Date
  • Day & Night Indicator
  • Chronograph
  • Universal Time Zone


  • Self Winding/Automatic
  • Manufactured
  • Swiss Made


  • Round
  • Titanium
  • Brushed & Polished
  • 17.10mm
  • 44.00mm


  • Sapphire

Water resistance

  • 10.00atm / 100.00m / 330.00ft


  • Pin Buckle
  • Titanium


  • Textile
  • Black


  • 2023

Official description

Following his recording breaking ascent to Everest with the first Montblanc 1858 0 Oxygen timepiece in May 2022 without supplemental oxygen, Mark Maker Nimsdai Purja continues to serve as the inspiration for the latest edition of the watch that’s ready to accompany him on his next adventure - the Montblanc 1858 Geosphere Chronograph 0 Oxygen The 8000 Limited Edition 290.

The timepiece is powered by Montblanc’s Manufacture automatic chronograph with worldtime complication, Calibre MB 29.27, which has a power reserve of approx. 46 hours. The timepiece includes two 3D turning globes with the Northern Hemisphere at 12 o’clock and the Southern Hemisphere at six o’clock. North Hemisphere feature 14 orange dots, marking the location of the 8000m peaks, surrounded by Day&Night indicators. Both hemispheres also use the colour orange to mark the Greenwich reference meridian for easy setting of the worldtime function.

The chronograph functions are made up of a central chronograph seconds hand, a 30-minute chronograph counter at three o’clock, and a 12-hour chronograph counter at nine o’clock – all with orange-tipped hands. The chronograph is operated via pushers on either side of the crown. There is also a date at three o’clock and a glacial blue luminescence added to the hours, minutes, numerals, indexes, continents, and cardinal points of the bezel for visibility at night.

The 44mm titanium case, which has been assembled without oxygen, comes with a fluted bi-directional black ceramic bezel with cardinal points, and a 3D coloured laser engraving on the caseback. The engraving showcases the list and profiles of the 14 Eight Thousander peaks according to Nimsdai. The engraving also includes the name of the watch, two inspirational quotes from Nimsdai, three Himalayan prayer flags for good fortune, and the mention “Limited Edition.

The watch comes with an interchangeable anthracite textile strap, the design of which has been inspired by the rope – a vital tool to any mountaineer.