Eterna · Adventure
Strap for Eterna Adventure 7755.40.50.1289
The Royal KonTiki Chronograph Strap takes 20 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, Orange
Grand Cavalier Leather Strap Orange
€120
★ 4.9 · 12
1 / 109
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 Eterna Adventure 7755.40.50.1289
What strap size does the Eterna Adventure 7755.40.50.1289 take?
The Eterna Adventure 7755.40.50.1289 needs 20 mm between the lugs. It's the size I've been fitting on it for years.
Can the strap on the Eterna Adventure 7755.40.50.1289 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 Eterna Adventure 7755.40.50.1289?
Yes, in 20 mm leather. On a 42 mm chronograph I like box calf: it holds its shape and carries a substantial case.
Which strap do you recommend for the Eterna Adventure 7755.40.50.1289?
A 20 mm box calf. You'll find it ready in the 20 mm collection. If you'd rather have something built on your wrist, the Casati atelier.
More Adventure
All Adventure → Eterna families →
Every Adventure reference with its measured lug width, on watchbands.ai →
More Eterna in 20 mm
- Chronograph Limited Edition 1938Heritage
- Military Limited Edition 1939Heritage
- Military Limited Edition 1939 PVDHeritage
- Super Kontiki Limited Edition 1973Heritage
- Avant-Garde Quartz Big Date Black / BraceletContemporary
- Avant-Garde Quartz Big Date White / StrapContemporary
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
