IWC · Grande Complication
Strap for IWC Grande Complication IW3770-25
The Grande Complication 3770 Rose Gold / Ardoise / English takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
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- Ships in 1–3 working days
- Worldwide shipping
- 30-day returns
- 12-month warranty on manufacturing defects
- Hand-stitched in Milan
Lug width
Your watch with our straps
Calf, Brown
Vintage Brown Calfskin Strap — Natural Patina
€98
★ 4.9 · 11
1 / 78
Real photos of the strap and the case. No generated images.
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 IWC Grande Complication IW3770-25
What strap size does the IWC Grande Complication IW3770-25 take?
The IWC Grande Complication IW3770-25 needs 22 mm between the lugs. It's the size I've been fitting on it for years.
Can the strap on the IWC Grande Complication IW3770-25 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 IWC Grande Complication IW3770-25?
Yes, in 22 mm leather. On a 42 mm case a calf strap works every day; if you want something more, alligator.
Which strap do you recommend for the IWC Grande Complication IW3770-25?
A 22 mm calf strap, for every day. You'll find it ready in the 22 mm collection. If you'd rather have something built on your wrist, the Casati atelier.
More Grande Complication
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- Destriero Scafusia Red Gold / Bracelet / English22 mm
- Destriero Scafusia Platinum / Blue / English22 mm
- Destriero Scafusia Red Gold / Black / English22 mm
- Destriero Scafusia Yellow Gold / German22 mm
- Destriero Scafusia Yellow Gold / English22 mm
- Destriero Scafusia Platinum / German22 mm
All Grande Complication → IWC families →
Every Grande Complication reference with its measured lug width, on watchbands.ai →
More IWC in 22 mm
- Vintage Aquatimer Automatic 1967 Stainless SteelVintage Collection
- Vintage Aquatimer Automatic 1967 Rose GoldVintage Collection
- Vintage Aquatimer Automatic 1967 White GoldVintage Collection
- Vintage Aquatimer Automatic 1967 PlatinumVintage Collection
- Vintage Aquatimer Automatic 1967 Rose Gold / SincereVintage Collection
- Vintage Aquatimer Automatic 1967 White Gold / WhiteVintage Collection
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
Bespoke straps for IWC, in the atelier or by video call: casatimilano.com