It is well known that Deepsea is a watch from the Rolex brand,which is the new model of the Rolex watches, its NO. is 116660. It has been named as Rolex Deepsea because it is test in the deep sea about 12,800 inch deep by the official.And it is proved that it can still work normally,i have to say that this is its outstanding feature. It belongs to the Serial production of mechanical watches.