The Titanium Field Guide

Montblanc 1858 Geosphere 0 Oxygen Mount Elbrouz Limited Edition

MB136353

The Montblanc 1858 Geosphere 0 Oxygen Mount Elbrouz Limited Edition is a current-production field watch with a Titanium (grade undisclosed) case, finished with titanium upper and lower case with a proprietary composite midcase of volcanic ash, aluminised basalt fibres, calcium carbonate and a bio-sourced resin; bidirectional bezel with a knurled grey anodised aluminium insert; case sealed in a nitrogen-filled oxygen-free tank. It is priced well above the $499 median for the category.

All Montblanc watchesTitanium field watchesWorldtimerGMT
Price
$10,600
Titanium
Titanium (grade undisclosed)
Water resistance
100 m
Nickel-free
No
Reference
MB136353
Type
Field
Case diameter
43.5 mm
Thickness
13 mm
Origin
Germany
Movement
Automatic worldtimer with a second time zone and day/night indication
Caliber
Montblanc MB 29.25 (Sellita SW300-1 base, in-house worldtime module)
Power reserve
42 h
Complications
Worldtimer, GMT, Date
Case shape
Round
Case colour
Natural / grey
Finish technology
Natural finish
Surface treatment
Titanium upper and lower case with a proprietary composite midcase of volcanic ash, aluminised basalt fibres, calcium carbonate and a bio-sourced resin; bidirectional bezel with a knurled grey anodised aluminium insert; case sealed in a nitrogen-filled oxygen-free tank
Caseback
Titanium
Bracelet / strap
Two interchangeable rubber straps, ivory and light brown, on a double folding clasp; 22 mm lugs
Crystal
Domed sapphire, AR coated
Display back
No
Dial
White-brown sfumato glacier pattern
Dial colours
White Brown
Lume
Super-LumiNova, orange emission on the hands and blue on the worldtime continents
Availability
Offered
Status
Limited edition (829 pieces)
Not published
Lug-to-lug, Weight, Titanium bracelet Help verify
Medium confidence Verified Aug 2026 Source: Montblanc (maker product page) / Monochrome (hands-on)
Facts are free to cite with a link.
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Frequently asked questions

Is the Montblanc 1858 Geosphere 0 Oxygen Mount Elbrouz Limited Edition nickel-free?

No. At least one part that touches the skin is nickel-bearing steel (commonly the caseback or clasp), so the guide does not mark it nickel-free.

What grade of titanium is the Montblanc 1858 Geosphere 0 Oxygen Mount Elbrouz Limited Edition?

The Montblanc 1858 Geosphere 0 Oxygen Mount Elbrouz Limited Edition has a Titanium (grade undisclosed) case with a titanium caseback. It is recorded at medium confidence pending a maker-stated grade.

What size is the Montblanc 1858 Geosphere 0 Oxygen Mount Elbrouz Limited Edition?

It is 43.5 mm in diameter, 13 mm thick, and water resistant to 100 m.

How much does the Montblanc 1858 Geosphere 0 Oxygen Mount Elbrouz Limited Edition cost, and is it available?

It is current-production and lists from $10,600.

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