Montblanc 1858 Geosphere

The strap size depends on the reference. Yours is engraved on the case back or between the lugs at 6 o'clock.

20 or 22 mm

Verification: From our database, not yet verified

42 mm case · 2018 to 2022

Indicative information. Check your watch before buying a strap: whatsmylugwidth.com is not responsible for an incorrect size.

Collection13 references

Illustration drawn to scale: 42 mm case, 22 mm lugs

13 Montblanc 1858 Geosphere references

Montblanc 1858 Geosphere references in our database. Each card says where its width comes from: listed by the maker (linked to the maker's page in the details), two independent sources agree, or listed in our database and not yet verified by us.

MB128257

1858 Geosphere 1858

Lug width: 22 mm
Source: Database

Case size: 42 mmBlack dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
MB119347

1858 Geosphere 1858

Lug width: 22 mm
Source: Database

Case size: 42 mmBlack dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
MB130982

1858 Geosphere 1858

Lug width: 22 mm
Source: Database

Case size: 42 mmBlack dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
MB128504

1858 Geosphere 1858

Lug width: 20 mm
Source: Database

Case size: 42 mmBrown dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
126758

1858 Geosphere 1858 Automatic 40 mm Blue

Lug width: 20 mm
Source: Database

Case size: 42 mmYear: 2020Blue dialCase material: Steel

Attachment
classic lugs
Style
pilot
Movement
Automatic
Caseback
Sapphire back
Production
2020, present

Status
Listed in our database, not yet verified
MB125565

1858 Geosphere

Lug width: 22 mm
Source: Database

Case size: 42 mmBlue / Navy dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
129415

1858 Geosphere Black Limited

Lug width: 22 mm
Source: Database

Case size: 42 mmYear: 2022Black dialCase material: Steel

Attachment
classic lugs
Style
pilot
Movement
Automatic
Caseback
Sapphire back
Production
2022, present

Status
Listed in our database, not yet verified
119347

1858 Geosphere Bronze

Lug width: 22 mm
Source: Database

Case size: 42 mmYear: 2019Black dialCase material: Bronze

Attachment
classic lugs
Style
pilot
Movement
Automatic
Caseback
Sapphire back
Production
2019, present

Status
Listed in our database, not yet verified
128504

1858 Geosphere Desert Bronze

Lug width: 20 mm
Source: Database

Case size: 42 mmYear: 2021Sand dialCase material: Bronze

Attachment
classic lugs
Style
pilot
Movement
Automatic
Caseback
Sapphire back
Production
2021, present

Status
Listed in our database, not yet verified
119909

1858 Geosphere Khaki Green

Lug width: 22 mm
Source: Database

Case size: 42 mmYear: 2019Green dialCase material: Steel

Attachment
classic lugs
Style
pilot
Movement
Automatic
Caseback
Sapphire back
Production
2019, present

Status
Listed in our database, not yet verified
128506

1858 Geosphere LE Minerva

Lug width: 22 mm
Source: Database

Case size: 42 mmYear: 2021Green dialCase material: Yellow Gold

Attachment
classic lugs
Style
pilot
Movement
Automatic
Caseback
Sapphire back
Production
2021, present

Status
Listed in our database, not yet verified
117837

1858 Geosphere Steel Black

Lug width: 22 mm
Source: Database

Case size: 42 mmYear: 2018Black dialCase material: Steel

Attachment
classic lugs
Style
pilot
Movement
Automatic
Caseback
Sapphire back
Production
2018, present

Status
Listed in our database, not yet verified
129416

1858 Geosphere Titanium Grey

Lug width: 22 mm
Source: Database

Case size: 42 mmYear: 2022Grey dialCase material: Titanium

Attachment
classic lugs
Style
pilot
Movement
Automatic
Caseback
Sapphire back
Production
2022, present

Status
Listed in our database, not yet verified

FAQ

What lug width does the Montblanc 1858 Geosphere use?

Montblanc 1858 Geosphere lug width: 20 or 22 mm depending on the reference. The most common is 22 mm (10 of the 13 references with a listed width in our database). Find your exact reference in the table below. These widths come from our database and are not yet verified.

Do all Montblanc 1858 Geosphere references take the same strap?

No. 2 different lug widths appear across the line, often by case size or generation. Check the reference engraved on the case back or between the lugs.

Where do these Montblanc 1858 Geosphere lug widths come from?

From our database, which lists 13 Montblanc 1858 Geosphere references, 13 of them with a listed width. Each reference card says whether the maker lists the width, two independent sources agree on it, or it is not yet verified.

Other Montblanc collections

1858 Automatic20 or 22 mm
1858 Chronograph20 or 22 mm
1858 GMT21 or 22 mm
Boheme12 to 17 mm
Heritage18 to 22 mm
Heritage Automatic20 mm
Heritage Chronométrie19 to 22 mm
Heritage GMT20 mm
Heritage Spirit18 mm
Iced Sea19 or 20 mm
Star19 to 22 mm
TimeWalker20 or 22 mm

All Montblanc collections

Help

What is lug width?

The gap between the two lugs that hold the strap, in millimetres. A new strap must match it exactly: 20 mm lugs take a 20 mm strap.

Measure it in 30 seconds

Take the strap off, or look at the back of it: many straps print their width.
Measure the inside gap between the lugs with a caliper or a millimetre ruler.
Round to the nearest whole millimetre. Most watches use 18, 20 or 22 mm.

Strap, quick release or system?

Most watches use spring bars, so any strap of the right width fits. Many smartwatches use their own band system instead, such as Apple Watch bands or Garmin QuickFit.