Rolex Explorer 2 16570 Black Swiss-Only DialA short run for this Exp 2 The Explorer 2, reference 16570, has been a real grower in the collector market over recent years. This is the rarest of the 16570s due to the dial that is signed only SWISS at the bottom that was made for only a couple of years. The dial remains in flawless condition with white gold hour marker surrounds with luminova lume and striking white text. Rolex collectors have a special love for a touch of red on their watches,