The Perpetual Calendar 5327 with a power reserve indicatior is equipped with a revised and improved extra-flat automatic movement, that operates its various functions in perfect symmetry, on a hand-guilloché silvered gold dial: the moon phases at 1:30 face the power reserve at 10:30; the leap year at 8 o’clock respond to the days at 4 o’clock; the date is at 6 o’clock; and the hours, minutes and month are found in the centre. Four correctors complete this exceptional mechanism, whose complexity is revealed through the sapphire crystal caseback.
