Automatic Perpetual Calendar, limited to 99 pieces The perfectly proportioned 18-karat white gold case houses the FC-710 automatic Perpetual Calendar movement, developed in collaboration with Dubois-Dépraz, one of Switzerland’s leading specialists in this complication. The hands are made of blued steel, the dial is crafted from invisible sapphire crystal, and only the three perpetual calendar counters and the hour, minute, and second ring appear to “float” above the movement, allowing one to admire its perfect finish both through the domed sapphire crystal and the sapphire case back. The perpetual calendar is mechanically “programmed” until the year 2100.