Rolex Oysterdate Precision 6494 Tropical Swiss Only Gilt dialThis Oysterdate Precision ref. 6494 is a significant mid 20th century timepiece, produced primarily between 1954 and 1959. It belongs to a lineage of manual wind Oyster date models that preceded the long running ref. 6694. Unlike Rolexs self winding Perpetual models, the 6494 is manually wound and not COSC certified. The Precision text on the dial reflects Rolexs high internal standards of accuracy despite the absence of official chronometer