Perrelet announces Big central Moonphase. Clearly influenced by the human obsession with the moon its phases and its effect on our planet. Regulated for the next hundred years (if operating constantly) the mechanism is set to indicate the exact moon phase. The latest addition to an already extremely refined collection is available in stainless steel and titanium. Dial choices are between silvered or black Arabic number and indices; and black and anthracite with luminous indices.