Christiaan van der Klaauw · Astronomical Masterpieces
Strap for Christiaan van der Klaauw Astronomical Masterpieces CKPT7724
The Planetarium 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
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- 12-month warranty on manufacturing defects
- Hand-stitched in Milan
Lug width

Your watch with our straps









Alligator and crocodile, Blue
Blue Alligator and Rubber Hybrid Strap
€138
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 | 120 / 70 mm |
| 16.5–17.8 cm | 125 / 75 mm |
| 17.9–19.0 cm | 130 / 80 mm |
| 19.1–20.3 cm | 135 / 85 mm |
| 20.4–21.6 cm | 140 / 85 mm |
| 21.7–22.9 cm | 145 / 90 mm |
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 Christiaan van der Klaauw Astronomical Masterpieces CKPT7724
What strap size does the Christiaan van der Klaauw Astronomical Masterpieces CKPT7724 take?
The Christiaan van der Klaauw Astronomical Masterpieces CKPT7724 needs 20 mm between the lugs, usually 16 mm at the buckle. It's the size I've been fitting on it for years.
Can the strap on the Christiaan van der Klaauw Astronomical Masterpieces CKPT7724 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 Christiaan van der Klaauw Astronomical Masterpieces CKPT7724?
Yes, in 20 mm leather. On a 40 mm case a calf strap works every day; if you want something more, alligator.
Which strap do you recommend for the Christiaan van der Klaauw Astronomical Masterpieces CKPT7724?
A 20 mm calf strap, for every day. You'll find it ready in the 20 mm collection. If you'd rather have something built on your wrist, the Casati atelier.
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All Astronomical Masterpieces → Christiaan van der Klaauw families →
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
