Pre-owned Rolex Explorer II ref 16570 (1993-1994) s/n S319532 is one of the most fascinating editions of the famous spelunker's tool watch. Produced for several decades, many iterations of the watch came to market, including the black dial example you see here. It was made near the end of the collection's production run and sports newer Super-LumiNova material on the dial. As a modern pre-owned Rolex, ref. 16570 also features a scratch-resistant sapphire crystal, a high-beat movement, and a durable stainless steel finish. The arrow hand operates independently of the other hands, which means it can track AM and PM hours and a second time zone