Rolex. A Fine Stainless Steel Automatic Wristwatch with Center Seconds, Date, Gas Escape Valve, and BraceletSigned Rolex, Oyster Perpetual Date, Sea-Dweller, 2000ft=610m, Superlative Chronometer Officially Certified, Ref. 1665, Case No. 8'064'903, Circa 1983Cal. 1570 jewelled movement, matte black dial, luminous dot, baton and dagger numerals, luminous mercedes hands, center seconds, aperture for date, tonneau-shaped water-resistant-type case, revolving black bezel calibrated for 60 units, gas escape valve in the band, screw down crown, screw back engraved Rolex Oyster, Original Gas Escape Valve, stainless steel Rolex Oyster bracelet and deployant clasp, case, dial, and movement signed39.5mm diam.