The Bronze 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 by maker) 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.

Bronze field watchesField
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
Ceramic
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
Ceramic 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 ↗
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Frequently asked questions

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

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

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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