This beautiful 1973 Rolex Datejust 1603 Sigma dial not only is it an integral part of the watch worlds most important family, the Oyster Perpetual, but its details are wonderful. From its complete set of tritium lume plots and matching hands to the old-world steel engine turned bezel, this Rolex Ref. 1603 is a perfectly preserved blast from the past. The watch is in a stainless steel 36mm case. The all original dial is marked: Rolex Oyster Perpetual Datejust Superlative Chronometer Officially Certified 0 T Swiss T 0. The serial number of the watch is 3,80X,XXX. The model number is 1603. The model and serial numbers are clearly readable between the lugs. The original Rolex automatic wind movement is the 26 jewel cal. 1570.