ROLEX mod. Oyster Perpetual date "Submariner", Superlative Chronometer Officially Certified. Ref. 1680 nº 5042372. Men's watch with steel case and bracelet. Year 1977. Black dial with tritium treated numbering and "Skeleton" type hands treated with tritium, central seconds and auxiliary window with date calendar at 3. Rotating and graduated bezel to control decompression times. Special Oyster case with crown protection. Hermetic up to 200 meters. Fliplock bracelet. Automatic movement, caliber 1575. Running condition.