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Christiaan van der Klaauw Astronomical Watches
Real Moon Joure Onyx with its three-dimensional Moon

Astronomical Masterpiece - CKRJ99O4

CVDKReal Moon Joure Onyx

The CVDK Real Moon Joure Onyx places its three-dimensional Moon against the deep, uninterrupted black of natural Onyx. The lunar display follows the true cycle of the Moon with a deviation of only one day in 11,000 years, while a brushed 40 mm Grade 5 titanium case and grey Jeans/FKM strap give this version a distinctly contemporary character.

The Moonagainst absolute black

Black Onyx creates an unusually pure backdrop for the Real Moon Joure. Unlike dials defined by texture or sparkle, its appeal lies in a dense, almost uninterrupted black surface that allows the indexes, hands and three-dimensional Moon to stand clearly apart.

The effect is especially suited to the lunar complication. As the miniature Moon rotates, its illuminated and shadowed surfaces become increasingly pronounced against the dark stone, turning the changing moon phase into the visual focus of the dial.

Real Moon Joure Onyx, detail 1
Real Moon Joure Onyx, detail 2
Real Moon Joure Onyx, detail 3
Real Moon Joure Onyx, detail 4
Real Moon Joure Onyx, detail 5
Real Moon Joure Onyx, the hours, minutes and three-dimensional Moon

Specifications

The Real Moon Joure combines hours and minutes with its highly precise three-dimensional moon phase. A hand-made miniature Moon rotates through the real lunar cycle, using its illuminated and shadowed surfaces to show the changing phase directly.

Time
Hours & minutes
Astronomical
3D Moon Phase
Accuracy
1 dayin 11,000 years
The CKM-01 Manufacture movement through the sapphire caseback

Caseback

The CVDK Real Moon Joure Onyx is powered by the automatic CKM-01 Manufacture movement. Its 60-hour power reserve drives the time indication together with the dedicated Real Moon Joure module responsible for the exceptionally precise lunar display.

Power reserve
60Hours
Winding
Automatic
Jewels
32
Real Moon Joure Onyx CKRJ99O4, front

The most accurate 3D moon phase

The Real Moon Joure reproduces the Moon’s approximately 29.530588853-day cycle through the rotation of a hand-made three-dimensional lunar sphere. Rather than representing the phase on a flat disc, the changing illuminated surface of the Moon itself forms the indication.

Its mechanical calculation accumulates a deviation of only one day in 11,000 years, making it the most accurate mechanical 3D moon phase in the world. The complication was recognised in 2014 when the Real Moon Joure was unanimously awarded European Watch of the Year by an international jury in London.

Other CVDKReal Moon Joure models

Made in theCVDK atelier

Every Christiaan van der Klaauw watch is made by hand and subjected to extensive quality testing in the atelier. Each watch is delivered in a CVDK presentation box and covered by a three-year warranty on the movement and case. Watches from the Collection of Astronomical Masterpieces are also supplied with a removable Swiss Kubik watch winder to keep the astronomical complication running accurately.

Discover our Manufacture

AstronomicalMasterpieces

Explore the Collection of Astronomical Masterpieces and the mechanical interpretations of astronomy at the heart of Christiaan van der Klaauw.

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