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 width
Straps for the Astronomical Masterpieces CKRS1124
Selected for the 20 mm lug width · workshop selection
Recycled Nylon Military Strap — Grey with Red Stitching€52
Light Blue Recycled Military Strap with Red Stitching€52
Eco Recycled Nylon Military NATO Strap — Green with Green Stitching€52
Recycled Nylon Military NATO Strap — Red and Black Edges€52
Eco-Friendly Recycled Nylon Military NATO Strap — Green with Orange Edges€52
The Astronomical Masterpieces CKRS1124, seen from the bench
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
