This watch is also known as:
IW9538-01 , IW953801 .
Cutting the big Da Vinci down to size and packing a total of 233 parts into a movement 24 millimetres in diameter and less than 4 millimetres in height was extremely complex and took three whole years. The result was the 630 calibre movement, which takes up just a third of the volume of the original men?s calibre. Two quartz precision stepping motors supply the power required for the mechanical chronograph movement. The smallest member of the extensive Da Vinci family will display the phase of the moon exactly to the day for the next 122 years, keeping track of the minutes and hours and seconds and recording times to an accuracy of a quarter of a second.