Automatic Movement, Features a Second Time Zone Function indicated at 6 o'clock position (with a Quick Set Adjustment crown) & AM/PM Mode Indicator, Date Indicator at the 3 o'clock position: Regular Time & Date setting functions are set by the bottom crown. Water Resistant to 100m/330ft by a revolutionary new patented design - Although the crowns are not "screw down" they are equipped with an external butterfly collar that turns 1/2 turn clock-wise & counter clock-wise (independently of the crown), each collar has red & white enamel indicating arrows. White arrow indicates the crown is secure/water resistant, Red Arrow indicates the crown is non-secure/non-water resistant. When the collar is in the secure position it compresses a gasket that ensures water resistance. Luminous hands & hour markers.