I feel the grand sekio is far superior to Rolex. I have a 9R65 movement and it only is off by 1/2 second in a month or 1 second in two months. I’m amazed how durable the watch is I wear it all the time and I’m pretty Tuff on them between mowing the grass and working with my power tools it runs tried and true. I also go swimming and snorting in the Gulf of Mexico im a big fisherman. Great article much appreciated.