Manual Wind Movement with a Perpetual Calendar, Chronograph & Moon-Phase Functions. Perpetual Calendar Displays Day & Month in windows beneath the 12 o?clock position, The sub-dial at the 6 o’clock position displays the date & moon phases, small window between the 1 & 2 o’clock position displays the leap year cycle. Sub-dials at the
3 & 9 o’clock position are the Chronograph function indicators. Transparent case back with flip open door cover.