Rolex Oyster Perpetual Submariner Date 16800. Circa 1985. 40mm diameter Stainless Steel case, which is water resistant to a depth of 300 meters. Automatic chronometer movement. Matt black dial with index and dot hour markers, black uni-directional bezel. Steel Oysterlock bracelet. The 16800, first released in 1978, was the first Submariner model to be water resistant to a depth of 300 meters, having been previously certified to 200. Watch and box only.