Christiaan van der Klaauw · Astronomical Masterpieces

Strap for Real Moon Tides Rose Gold

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter40 mm
ReferenceCKRS1124
FamilyAstronomical Masterpieces
MovementChristiaan van der Klaauw caliber CVDK7383 Hours, Minutes | Moonphase, Tide
CaseRose Gold

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Astronomical Masterpieces CKRS1124

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Astronomical Masterpieces CKRS1124, seen from the bench

The Christiaan van der Klaauw Astronomical Masterpieces CKRS1124 is powered by the in-house developed calibre CVDK7383. The movement displays hours, minutes and features astronomical complications with moon phases and tide indicator. The watch uses 20mm lugs for the strap.

Frequently asked questions

What is the lug width of the Christiaan van der Klaauw Astronomical Masterpieces CKRS1124?

The lug width of the CKRS1124 is 20mm. Measurement is taken from the interior edge of one lug to the other using a digital calliper, positioned perpendicular to the case lugs. This specific width requires purpose-calibrated straps to ensure precise fit without lateral movement or gap.

Which strap is best suited for the Christiaan van der Klaauw CKRS1124?

The ideal strap depends on usage and aesthetic preference. For maximum coherence with an astronomical complication timepiece, we recommend vegetable-tanned alligator in dark tones or cordovan shell in mahogany red; these materials develop temporal patina synchronising with the natural oxidation of rose gold. Alternatively, artisanal leather or cotton NATO for greater versatility.

How do I correctly change the strap on the CKRS1124 with 20mm lugs?

Use a spring bar tool, selected carefully to avoid damage to the rose gold case. Position the watch on a stable support with lug facing upward. Insert the tool tip into the lug hole to release the spring bar tension, extract the spring bar itself and remove the existing strap. Insert the spring bar into the new strap (verifying it moves smoothly) and seat both terminals firmly into the lug apertures, confirming full lock on both sides.

Can I use aftermarket straps for the Christiaan van der Klaauw CKRS1124?

Yes, provided they are purpose-calibrated for 20mm lug width. Quality artisanal aftermarket straps, such as those offered by milanostraps.it, deliver aesthetic versatility whilst maintaining precise constructive tolerances. Universal or adjustable-width straps are not recommended, as they cannot guarantee the millimetre-level fit required to protect the internal astronomical movement.

How long does a leather strap last on the CKRS1124 and how should it be maintained?

A quality alligator or vegetable-tanned calf strap typically lasts 3–5 years with daily wear, sometimes longer with proper maintenance. Lifespan depends on exposure to humidity, direct sunlight and perspiration. Maintain the strap by gentle brushing with a soft brush, applying vegetable-oil conditioner every 6–8 months and thorough drying after water contact. Cordovan shell, if regularly maintained, can exceed 7–10 years whilst retaining lustre and structural integrity.

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