Rolex Submariner in 18k gold Tropical dial ref 1680/8 Golden NuggetA gold diving watch. A GOLD diving watch! Let's be honest, nobody needs a gold diving watch, right? So, what was Rolex thinking at the end of the 1960s when they introduced the new reference 1680 8 in 18k gold? Initially available only with black matte dials, this model saw the introduction of soleil blue dials in the early 1970s. We have just thata blue soleil finished dial that has, over time, transformed into a rich honey brown color. Just take a