A Lange & Sohne 310.032 Langematik Perpetual 38.5mm Mens Watch. Silver colored solid silver dial with Applied Roman Numeral Hour Markers. Patented large double window date display located at the top of the dial. Small Seconds sub-dial with inset Moonphase window located at the bottom of the dial. Day of week & 24 hour indicator (am/pm) located at the 9 o'clock position sub-dial. Month Indicated by the subdial at the 3 o'clock position - with inset leap year indicator.In addition this watch has a "Zero Reset" seconds hand which resets the seconds hand to zero when you pull out the crown to adjust the time, this makes it extremely easy to synchronize the watch to perfection.