Rolex Oyster Perpetual Date Submariner: a steel and gold cased automatic wristwatch

Rolex Oyster Perpetual Date Submariner: a steel and gold cased automatic wristwatch, ref 116613LB, serial no.70559xxx, the blue dial with triangular, rectangular and dot numerals, central seconds hand and date aperture, inscribed '1000ft = 300m Superlative Chronometer Officially Certified', fitted an automatic movement, case 42mm wide, on steel and gold graduated link Rolex bracelet, with warranty card, booklets and box.