Christiaan van der Klaauw · Astronomical Masterpieces

Strap for Real Moon Tides Steel

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
ReferenceCKRS3324
FamilyAstronomical Masterpieces
MovementChristiaan van der Klaauw caliber CVDK7383 Hours, Minutes | Moonphase, Tide
CaseStainless Steel

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 CKRS3324

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Astronomical Masterpieces CKRS3324, seen from the bench

The Christiaan van der Klaauw Astronomical Masterpieces CKRS3324 is powered by the automatic CVDK7383 caliber with indications of hours, minutes, moon phases and tides. The watch features astronomical complications made by the Dutch manufacture specialized in this type of indications. The lugs measure 20mm in width.

Frequently asked questions

What is the lug width of the Christiaan van der Klaauw Astronomical Masterpieces CKRS3324?

The lug width of the CKRS3324 is 20 mm. This measurement represents the distance between the strap attachment pins on the case and must be measured precisely using a digital calliper, verifying the distance between the internal mounting points where the strap is inserted.

What is the best strap for the Christiaan van der Klaauw Astronomical Masterpieces CKRS3324?

The finest choice is a natural brown alligator strap with vegetable tanning, which complements the complexity of the astronomical dial and harmonises with the patina of the stainless steel case. For formal occasions, a black vegetable-tanned calf leather strap offers pure elegance. Selection depends on intended use: refined for daywear, sportive-formal for FKM rubber.

How do you change the strap on the Christiaan van der Klaauw Astronomical Masterpieces CKRS3324?

The strap is changed by removing the two lateral pins that hold the lug to the case. Using a strap removal tool or a small flathead screwdriver, apply gentle pressure on the pins to slide them out of their seats. Once the old strap is removed, insert the new one by aligning the lug holes with the pins and pushing them until fully seated in the case.

Which aftermarket straps are compatible with the CKRS3324?

All straps with a 20 mm lug width are compatible with the CKRS3324. At milanostraps.it, a comprehensive selection of 20 mm straps is available in alligator, calf, shell cordovan, and rubber, handcrafted with metal pads and rings ensuring perfect fit on the case.

How long does a leather strap last on the CKRS3324?

A quality leather strap (alligator, calf, shell cordovan) has an average lifespan of 3–5 years with daily use, varying based on UV exposure, humidity, and maintenance frequency. Vegetable-tanned leather ages naturally, acquiring patina and character. FKM rubber offers superior durability (5–8 years) but less aesthetic versatility. Rotating between multiple straps significantly extends the lifespan of each.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only