Rolex Oyster Perpetual Yacht-Master II Regatta Chronograph 116689. Featuring an 18ct white gold, 44mm diameter case which is water resistant to 100 meters. The Yacht-Master II uses the Automatic 4160 movement, which was developed entirely by Rolex, consisting of 360 individual components backed by a 72-hour power reserve. Presented with a delightfully clear white dial displaying hours, minutes and subsidiary seconds. The Yacht-Master II was the first Rolex watch to feature a countdown function, which is programmable from 1 to 10 minutes, allowing the wearer to set their watch to a specific regatta start time. White gold Oyster lock bracelet. Box and V-series serial papers dated April 2017. Our reference S21701.