Apart from the hours, minutes and seconds, the regulator dial of the RICHARD LANGE PERPETUAL CALENDAR “Terraluna” also accommodates the four precisely-jumping perpetual calendar displays: date, day of week, month and leap year. The patent-pending orbital moon-phase display can be admired through the sapphire-crystal caseback of the watch. It shows the current moon phase as well as the positions of the moon and sun as an observer in the northern hemisphere would see them. The day and night halves of this hemisphere are also discernible. The Terraluna is available in pink or white gold.