About This Watch: The Oyster Perpetual Datejust is the watch of reference for those who believe that being sophisticated is timeless. This Rolex Watch 116201 BKDJ has a self-winding mechanical movement with a magnified date window with rapid setting. It features a black dial, diamond hour markers, and an anti-reflective sapphire crystal. Its finely crafted stainless steel case is 36mm in diameter. This watch is water resistant up to 100 meters; 330 feet.