Astronomical table clock, signed on the dial Cronier Ainé Paris, made in the first quarter of the nineteenth century. The mahogany case is glazed on all sides and is surmounted by a planetarium. The movement is of typical design with pinwheel escapement, compensation pendulum and half-hour striking on a bell. The planetarium, which depicts the then known solar system, consists of five ivory spheres: representing the planets (with the exception of Pluto) turning around a brass sphere representing the sun (Pluto was discovered as late as 1930). The ivory earth turns on its axis together with its moon.