(OYSTER PERPETUAL DATEJUST- BLUE REF. 1603), circa 1975 Brushed steel sports watch with fluted bezel with screwed back and crown (Signed and numbered). Metallic blue dial with applied indexes, tritium dots and luminescent skeleton hands. Cyclops magnifying glass date by window at 3 o'clock. Jubilee steel bracelet with vintage Rolex folding clasp (Rolex Usa) and a N.A.T.O. Fabric. Movement: Automatic mechanical caliber signed ROLEX / 1570 Swiss. Diam. 36mm. Condition: Very good (Rolex pyramid box, papers and certificate of origin).