Rolex Submariner Date 116613LB Blue Dial Apr 2019,Whilst all Submariner 116613LB watches have blue dials, the earliest examples of these “Bluesy??Subs showcased a shade that was not iridescent as being the sunburst dials of the preceding reference 16613. Rolex opted in its place for any flat shade of blue to match the tone with the blue Cerachrom