The Wristwatch Field Guide

Montblanc 1858 Geosphere 42mm Titanium (strap)

125565 Archive · used only

The Montblanc 1858 Geosphere 42mm Titanium (strap) is a discontinued other watch with a grey grade 5 case, finished with satin and polished; ceramic bezel. It measures 42.0 mm across, 12.8 mm thick, and is water resistant to 100 m. Inside is the Montblanc MB 29.25 automatic (worldtime) movement, with 42 h power reserve. Complications: Worldtimer, Date. Priced from $6,550 (EUR 5,600). Brand origin: Germany. No longer offered new; listed here as an archive reference for the used market.

Titanium and ceramic other watchesTitaniumDisplay back
Reference
125565
Type
Other
Price
$6,550 · EUR 5,600
Case diameter
42.0 mm
Thickness
12.8 mm
Lug-to-lug
–
Water resistance
100 m
Weight
–
Origin
Germany
Movement
Automatic (worldtime)
Caliber
Montblanc MB 29.25
Power reserve
42 h
Complications
Worldtimer, Date
Material
Titanium
Grade / type
Grade 5
Colour
Grey
Hardness
–
Construction
–
Surface treatment
Satin and polished; ceramic bezel
Caseback
Titanium
Nickel-free
Not verified (bracelet, strap, or clasp hardware not confirmed)
Bracelet / strap
Calfskin strap
Matching bracelet
–
Crystal
Sapphire
Display back
Yes
Dial
Blue
Lume
Super-LumiNova
Availability
No longer offered
Status
Discontinued (no live maker page; line moved to 1858 Geosphere 0 Oxygen)
Medium confidence Verified Jul 2026 Source: Montblanc Maker / listing ↗
Facts are free to cite with a link.
See it in the interactive guide

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Alternatives to the Montblanc 1858 Geosphere 42mm Titanium (strap)

SeikoProspex LX Line Spring Drive GMT Titanium (SNR035)$5,25044.8 mmOthersame category · same style · shared complications · similar price
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Girard-PerregauxCasquette 2.0 Titanium & Gold$4,96042.4 mm14.64 mm thickOthersame category · same style · similar price · similar size
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More titanium and ceramic watches from Montblanc

Montblanc1858 Geosphere 0 Oxygen The 8000 (Titanium)$6,80042.0 mmField
Montblanc1858 Geosphere 42mm Titanium (bracelet)$6,90042.0 mm12.8 mm thickOther

Frequently asked questions

What is the case material of the Montblanc 1858 Geosphere 42mm Titanium (strap)?

The Montblanc 1858 Geosphere 42mm Titanium (strap) has a grey grade 5 case with a titanium caseback. It is recorded at medium confidence pending a maker-stated material.

What size is the Montblanc 1858 Geosphere 42mm Titanium (strap)?

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

How much does the Montblanc 1858 Geosphere 42mm Titanium (strap) cost, and is it available?

It is no longer offered new; the guide keeps it as an archive reference for the used market, and it listed from $6,550 when current.

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