Rolex Seadweller Mk2 Matte Dial Reference 16660PHs matte beast SDIn the early 1980s Rolex began using more robust sapphire crystals on their watches. Known as transitional models, early example were fitted with matte dials a lot like the dials in the plastic glass watches that had preceded them. This transitional Seadweller is fitted with its original Mk2 matte dial (many were replaced at service with glossy dials) with a creamy patina on the hour plots that are a good match with the hand lume.