Product Images

1858 Geosphere Carbo2 0 Oxygen Automatic 44 mm Titanium Carbotech - Limited Edition image number 0 1858 Geosphere Carbo2 0 Oxygen Automatic 44 mm Titanium Carbotech - Limited Edition image number 1 null image number 2 null image number 3 null image number 4 null image number 5
1858 Geosphere Carbo2 0 Oxygen Automatic 44 mm Titanium Carbotech - Limited Edition image number 0 1858 Geosphere Carbo2 0 Oxygen Automatic 44 mm Titanium Carbotech - Limited Edition image number 1 null image number 2 null image number 3 null image number 4 null image number 5

With this limited edition timepiece showcasing a design as strong as the innovation within, Montblanc pushes the concept of oxygen – the central element in any intrepid ascent – even further than before. The watch case material, the CARBO₂, is created using a pioneering process development that captures CO₂ from biogas production and mineral wastes from recycling factories. Reinforcing the theme of adventure, the 43.5 mm case totally devoid of oxygen comes with an engraved luminous blue outline of the Mont Blanc Mountain on the side while a 3D colored laser engraving of the Mont Blanc mountain adorns the titanium case back. The timepiece is powered by the MB 29.25 automatic movement with Montblanc’s Manufacture worldtime complication, which includes rotating Northern and Southern Hemisphere globes, a 24-hour scale, Day & Night indications, dual time display, and a date. Completing the timepiece is a black interchangeable rubber strap featuring a taper and a fine adjustment system, with the pattern reminiscent of the textiles used by mountaineers.


  • Product Number: 450018591555
  • Model Number: 132300
  • Collection: 1858
  • Movement: Automatic
  • Dial Colour/Material: Black
  • Case Size: 44
  • Case Material: Carbotech
  • Bracelet: Rubber
  • Complication: World Time
  • Warranty: 2 year warranty
  • Case Thickness: 13.0 mm
  • Caseback: Engraved, Stainless Steel
  • Bezel: Bi-directional turning
  • Watch Crystal: Domed sapphire crystal
  • Clasp: Folding Clasp
  • Calibre: MB 29.25
  • Power Reserve: 42 hours
  • Functions: Hours, Minutes, Seconds, Date, 24-hour scale, Day & Night indicators and dual time display.
  • Water Resistance: 100 metres / 10 ATM
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EXTENDED HOLIDAY RETURN POLICY

For all regular-priced merchandise purchased online at MaisonBirks.com or in a Maison Birks or Birks Royalmount store from December 1st - 13th, 2025, returns and exchanges will be accepted until January 14th, 2026.

RETURNS

All watches purchased on MaisonBirks.com can only be returned or exchanged by mail within 30 days of delivery, provided merchandise has not been worn, altered, engraved, or special-ordered. All claims, returns, battery replacement, or warranty service must be accompanied by proof of purchase, original packaging and warranty materials. All returns are subject to a quality inspection to ensure the merchandise meets our return policy criteria. All merchandise purchased with cryptocurrency is final sale. For more information, click here.

Montblanc

Montblanc 1858 Geosphere Carbo2 0 Oxygen Automatic 44 mm Titanium Carbotech - Limited Edition

1858 Geosphere Carbo2 0 Oxygen Automatic 44 mm Titanium Carbotech - Limited Edition
Estimated Price:
$ 12,100
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All images shown are for illustration purposes only. Actual product may vary. Birks reserves the right to change the font, size and text orientation depending on the engraving message for best result.

Please note the estimated time for our engraving services is 7 to 10 business days. Engraved items are final sale.

Once adjusted Tudor watches are final sale.

Note that in store (after sale) adjustments to your Tudor watch is available exclusively in Official Tudor Maison Birks locations.

With this limited edition timepiece showcasing a design as strong as the innovation within, Montblanc pushes the concept of oxygen – the central element in any intrepid ascent – even further than before. The watch case material, the CARBO₂, is created using a pioneering process development that captures CO₂ from biogas production and mineral wastes from recycling factories. Reinforcing the theme of adventure, the 43.5 mm case totally devoid of oxygen comes with an engraved luminous blue outline of the Mont Blanc Mountain on the side while a 3D colored laser engraving of the Mont Blanc mountain adorns the titanium case back. The timepiece is powered by the MB 29.25 automatic movement with Montblanc’s Manufacture worldtime complication, which includes rotating Northern and Southern Hemisphere globes, a 24-hour scale, Day & Night indications, dual time display, and a date. Completing the timepiece is a black interchangeable rubber strap featuring a taper and a fine adjustment system, with the pattern reminiscent of the textiles used by mountaineers.


  • Product Number: 450018591555
  • Model Number: 132300
  • Collection: 1858
  • Movement: Automatic
  • Dial Colour/Material: Black
  • Case Size: 44
  • Case Material: Carbotech
  • Bracelet: Rubber
  • Complication: World Time
  • Warranty: 2 year warranty
  • Case Thickness: 13.0 mm
  • Caseback: Engraved, Stainless Steel
  • Bezel: Bi-directional turning
  • Watch Crystal: Domed sapphire crystal
  • Clasp: Folding Clasp
  • Calibre: MB 29.25
  • Power Reserve: 42 hours
  • Functions: Hours, Minutes, Seconds, Date, 24-hour scale, Day & Night indicators and dual time display.
  • Water Resistance: 100 metres / 10 ATM
View More Details
View Fewer Details

EXTENDED HOLIDAY RETURN POLICY

For all regular-priced merchandise purchased online at MaisonBirks.com or in a Maison Birks or Birks Royalmount store from December 1st - 13th, 2025, returns and exchanges will be accepted until January 14th, 2026.

RETURNS

All watches purchased on MaisonBirks.com can only be returned or exchanged by mail within 30 days of delivery, provided merchandise has not been worn, altered, engraved, or special-ordered. All claims, returns, battery replacement, or warranty service must be accompanied by proof of purchase, original packaging and warranty materials. All returns are subject to a quality inspection to ensure the merchandise meets our return policy criteria. All merchandise purchased with cryptocurrency is final sale. For more information, click here.

With this limited edition timepiece showcasing a design as strong as the innovation within, Montblanc pushes the concept of oxygen – the central element in any intrepid ascent – even further than before. The watch case material, the CARBO₂, is created using a pioneering process development that captures CO₂ from biogas production and mineral wastes from recycling factories. Reinforcing the theme of adventure, the 43.5 mm case totally devoid of oxygen comes with an engraved luminous blue outline of the Mont Blanc Mountain on the side while a 3D colored laser engraving of the Mont Blanc mountain adorns the titanium case back. The timepiece is powered by the MB 29.25 automatic movement with Montblanc’s Manufacture worldtime complication, which includes rotating Northern and Southern Hemisphere globes, a 24-hour scale, Day & Night indications, dual time display, and a date. Completing the timepiece is a black interchangeable rubber strap featuring a taper and a fine adjustment system, with the pattern reminiscent of the textiles used by mountaineers.


  • Product Number: 450018591555
  • Model Number: 132300
  • Collection: 1858
  • Movement: Automatic
  • Dial Colour/Material: Black
  • Case Size: 44
  • Case Material: Carbotech
  • Bracelet: Rubber
  • Complication: World Time
  • Warranty: 2 year warranty
  • Case Thickness: 13.0 mm
  • Caseback: Engraved, Stainless Steel
  • Bezel: Bi-directional turning
  • Watch Crystal: Domed sapphire crystal
  • Clasp: Folding Clasp
  • Calibre: MB 29.25
  • Power Reserve: 42 hours
  • Functions: Hours, Minutes, Seconds, Date, 24-hour scale, Day & Night indicators and dual time display.
  • Water Resistance: 100 metres / 10 ATM
View More Details
View Fewer Details

EXTENDED HOLIDAY RETURN POLICY

For all regular-priced merchandise purchased online at MaisonBirks.com or in a Maison Birks or Birks Royalmount store from December 1st - 13th, 2025, returns and exchanges will be accepted until January 14th, 2026.

RETURNS

All watches purchased on MaisonBirks.com can only be returned or exchanged by mail within 30 days of delivery, provided merchandise has not been worn, altered, engraved, or special-ordered. All claims, returns, battery replacement, or warranty service must be accompanied by proof of purchase, original packaging and warranty materials. All returns are subject to a quality inspection to ensure the merchandise meets our return policy criteria. All merchandise purchased with cryptocurrency is final sale. For more information, click here.

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