With this Yacht-Master II Rolex have developed a true regatta chronograph designed for yachting competition. The 44mm stainless steel case is rugged and elegant. The blue Ring Command bezel contrast perfectly with the white dial which features red an blue indicators for your 10 minute countdown timer. This combination of nautical colours strengthens the sailing heritage of the watch. At the heart of this watch beats calibre 4161, a self-winding mechanical chronograph movement entirely developed and manufactured by Rolex. To give you an indication of the complexity of this calibre, it is comprised of some 360 components. Working in harmony with the movement is the Ring Command bezel. This bezel allows the wearer to mechanically program the 10 minute countdown timer which is a key component to the start of any nautical race. The Yacht-Master II is most certainly the most aesthetically and functionally unique watch in the Rolex family. This watch was serviced and refinished in February of 2019 by Rolex. Service papers and box are included.