The Wristwatch Field Guide

Montblanc 1858 Geosphere 0 Oxygen Limited Edition (Bronze)

MB129415

The Montblanc 1858 Geosphere 0 Oxygen Limited Edition (Bronze) is a current-production field watch with a bronze (grade not stated) case. It measures 42.0 mm across, 12.8 mm thick, and is water resistant to 100 m. Inside is the MB 29.25 in-house automatic movement, with 42 hours power reserve. Complications: Worldtimer, Date. Priced from $6,500 (approx). Brand origin: Germany.

Titanium, ceramic, and bronze field watchesBronze
Reference
MB129415
Type
Field
Price
$6,500 · approx
Case diameter
42.0 mm
Thickness
12.8 mm
Lug-to-lug
–
Water resistance
100 m
Weight
–
Origin
Germany
Movement
In-house automatic
Caliber
MB 29.25
Power reserve
42 hours
Complications
Worldtimer, Date
Material
Bronze
Grade / type
Bronze (grade not stated)
Colour
–
Hardness
–
Construction
Assembled
Surface treatment
–
Caseback
–
Nickel-free
Not verified (contact-point materials not all confirmed)
Bracelet / strap
Blue Sfumato calf leather strap with bronze-coated stainless steel triple-folding clasp
Matching bracelet
–
Crystal
Sapphire (domed, anti-reflective)
Display back
No
Dial
Blue Sfumato gradient
Lume
Super-LumiNova
Availability
Offered
Status
Current (limited edition, 1786 pieces)
Medium confidence Verified Jul 2026 Source: Montblanc / Escapement Maker / listing ↗
Facts are free to cite with a link.
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Alternatives to the Montblanc 1858 Geosphere 0 Oxygen Limited Edition (Bronze)

Big Idea Design Ti GMTBig Idea DesignTi GMT$97540.5 mm53 gFieldsame category · same style · shared complications · similar sizeBremont Altitude MB Meteor Time ZonesBremontAltitude MB Meteor Time Zones$5,85042.0 mm12.23 mm thick53.4 gPilotsame style · shared complications · similar price · similar size
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Ochs und JuniorDue Ore Mese Two Time Zones (titanium)$6,90042.0 mmOthersame style · shared complications · similar price · similar size
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More titanium, ceramic, and bronze watches from Montblanc

Montblanc1858 Geosphere 0 Oxygen The 8000 (Titanium)$6,80042.0 mmField
Montblanc1858 Geosphere 42mm Titanium (strap)$6,55042.0 mm12.8 mm thickOther
Montblanc1858 Geosphere 42mm Titanium (bracelet)$6,90042.0 mm12.8 mm thickOther
Montblanc1858 Automatic Bronze$3,00040.0 mmField
Montblanc1858 Geosphere Bronze$6,10042.0 mm12.8 mm thickField
Montblanc1858 Monopusher Chronograph Limited Edition–42.0 mm14.7 mm thickChronograph

Frequently asked questions

What is the case material of the Montblanc 1858 Geosphere 0 Oxygen Limited Edition (Bronze)?

The Montblanc 1858 Geosphere 0 Oxygen Limited Edition (Bronze) has a bronze (grade not stated) case. It is recorded at medium confidence pending a maker-stated material.

What size is the Montblanc 1858 Geosphere 0 Oxygen Limited Edition (Bronze)?

It is 42.0 mm in diameter, 12.8 mm thick, and water resistant to 100 m.

How much does the Montblanc 1858 Geosphere 0 Oxygen Limited Edition (Bronze) cost, and is it available?

It is current-production and lists from $6,500.

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