Montblanc 1858

Most Montblanc 1858 references take a 20 mm watch strap: 19 of 31. The lug width follows the case size: 40 mm case → 20 mm, 42 mm case → 20 mm and 44 mm case → 22 mm.

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Montblanc 1858 lug width by case size

31 references measured. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
40 mm	20 mm	4	—	117832, 117833, 117834
42 mm	20 mm	8	—	117835, 117836, 117837
44 mm	22 mm · 20 mm on 4	13	—	112638, 112639, 113702
not recorded	20 mm · 22 mm on 2 · 21 mm on 1	6	—	MB126761, MB128504, MB129371

References that take a different watch strap

112637: 20 mm, not the 22 mm of most 44 mm cases
114086: 20 mm, not the 22 mm of most 44 mm cases
116243: 20 mm, not the 22 mm of most 44 mm cases
118775: 20 mm, not the 22 mm of most 44 mm cases
1858-GMT-MB129766: 21 mm
8000-MB130982: 22 mm
MB129415: 22 mm

Questions about the Montblanc 1858

Do all Montblanc 1858 case sizes take the same watch strap?

No. The lug width changes with the case size: the 42 mm case takes 20 mm and the 44 mm case takes 22 mm. Check your case diameter before you buy.

Can two Montblanc 1858 watches with a 44 mm case take different watch straps?

Yes. Of the 13 Montblanc 1858 references with a 44 mm case, 9 take 22 mm and 4 take 20 mm. The reference number decides, not the case size alone.

Every Montblanc 1858 reference

Other Montblanc families

Inside each one the lug width often changes: it is the reference that decides.

All Montblanc families → · Why the size changes inside a family →