In 1977 Rolex introduced an all white print dial for the reference 1680 Submariner Date, it marked the end of the red writing Submariner. Our model is the MK I series manufactured in 1978 with a 5 million serial number. With high perspex glass, white tritium luminous hour markers directly applied to the matt charcoal black dial and waterproof to 660ft - 200m, this classic 70's diver's watch paved the way for the current Submariner. Automatic calibre movement with date, bi-directional rotatable bezel .