The Titanium Field Guide

Montblanc 1858 Geosphere 42mm Titanium (strap)

125565 Archive · used only

The Montblanc 1858 Geosphere 42mm Titanium (strap) is a discontinued watch with a grade 5 titanium case, finished with satin and polished; ceramic bezel. It is priced well above the $1,425 median across the guide. The caseback is open, so the movement is visible. No longer offered new; listed here as an archive reference for the used market.

All Montblanc watchesWatch other watchesGrade 5 titaniumWorldtimerDisplay back
Price
≈$6,535 (€5,600)
Material
Titanium
Grade / type
Grade 5
Water resistance
100 m
Reference
125565
Type
Other
Case diameter
42.0 mm
Thickness
12.8 mm
Origin
Germany
Movement
Automatic (worldtime)
Caliber
Montblanc MB 29.25
Power reserve
42 h
Complications
Worldtimer, Date
Colour
Grey
Surface treatment
Satin and polished; ceramic bezel
Finish technology
Natural finish
Caseback
Titanium
Nickel-free
Unconfirmed (bracelet, strap, or clasp hardware not confirmed)
Bracelet / strap
Calfskin strap
Crystal
Sapphire
Display back
Yes
Dial
Blue
Dial colours
Blue
Lume
Super-LumiNova
Availability
No longer offered
Status
Discontinued (no live maker page; line moved to 1858 Geosphere 0 Oxygen)
Not published
Lug-to-lug, Weight, Hardness, Construction, Matching bracelet
Medium confidence Verified Jul 2026 Source: Montblanc
Facts are free to cite with a link.
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More watches from Montblanc

Montblanc 1858 Geosphere 0 Oxygen The 8000 (Titanium)Montblanc1858 Geosphere 0 Oxygen The 8000 (Titanium)$6,80042.0 mmField
Montblanc1858 Geosphere 42mm Titanium (bracelet)$6,88542.0 mm12.8 mm thickOtherMontblanc 1858 Geosphere 0 Oxygen Mount Elbrouz Limited EditionMontblanc1858 Geosphere 0 Oxygen Mount Elbrouz Limited Edition$10,60043.5 mm13 mm thickField
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 42mm Titanium (strap)?

The Montblanc 1858 Geosphere 42mm Titanium (strap) has a grade 5 titanium 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 $6,535 when current.

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