Astronomical clock by Ferdinand Berthoud, Paris France circa 1770 (clockmaker to Louis the XVI th King of France). Very decorative skeletonized movement indicating mean time, equation of time, month, date, zodiac signes, four main positions between earth and sun, moon age, golden number (Metonic cycle), Dominical Letters used for the calculation of the Easter date. Carillon music box in the bottom. Picture taken by Christian Loutz at the Pendulantic workshop in Neuchatel, Switzerland
