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Astronomy - time in its purest form - is the source of inspiration for Christiaan van der Klaauw since 1974. It is the\xa0only atelier in the world\xa0that is completely devoted to the design and production of exclusive, hand-made astronomical watches. The atelier produces in such small quantities per year that each watch is numbered. Famous for making the smallest mechanical Planetarium in the world, the most accurate 3D moon phase in the world with a deviation of only 1 day in 11,000 years and for exclusively making the Planetarium masterpieces for Van Cleef & Arpels. Officially listed as ‘Haute Horlogerie’.