Montblanc · 1858
Strap for Montblanc 1858 1858-GMT-MB129766
The Montblanc 1858 1858-GMT-MB129766 takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
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Lug width

Straps for the 1858 1858-GMT-MB129766
Selected for the 21 mm lug width
What length do I need?
Measure your wrist with a tailor's tape or a piece of string, comfortably snug.
| Wrist circumference | Length (long side / short side) |
|---|---|
| 15.0–16.4 cm | 110 / 70 mm |
| 16.5–17.8 cm | 115 / 75 mm |
| 17.9–19.0 cm | 120 / 80 mm |
| 19.1–20.4 cm | 125 / 80 mm |
| 20.5–21.6 cm | 130 / 85 mm |
| 21.7–22.9 cm | 135 / 85 mm |
| over 22.9 cm | on request |
The ready-to-wear strap is 115 × 75 mm. For a smaller or larger wrist I make it in the right length: order your length.
What I'm asked about the Montblanc 1858 1858-GMT-MB129766
What strap size does the Montblanc 1858 1858-GMT-MB129766 take?
The Montblanc 1858 1858-GMT-MB129766 needs 21 mm between the lugs. It's the size I've been fitting on it for years.
Can the strap on the Montblanc 1858 1858-GMT-MB129766 be changed?
Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.
Can I put a leather strap on the Montblanc 1858 1858-GMT-MB129766?
Yes, in 21 mm leather. On a case a calf strap works every day; if you want something more, alligator.
Which strap do you recommend for the Montblanc 1858 1858-GMT-MB129766?
A 21 mm calf strap, for every day. You'll find it ready in the 21 mm collection. If you'd rather have something built on your wrist, the Casati atelier.
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All 1858 → Montblanc families →
Every 1858 reference with its measured lug width, on watchbands.ai →
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For changing the strap
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only
The atelier's website: casatimilano.com






