Rolex Datejust Brown ‘Sigma’ Dial 1603THE DATEJUST BROWN SIGMA DIAL 1603 This 1603 is a fantastic example of one of Rolexs most enduring lines the mighty Datejust. The brown soleil dial has all its lume dots intact and the white text remains sharp. The term Sigma refers to the small greek letter sigmas that flank the T SWISS T on Rolex dials from the early 1970s. Their presence actually signifies that the hour markers are made from white gold. The sigma white gold markers are in perfect