ROLEX gents wristwatch Oyster Perpetual Date Sea-Dweller 4000, self winding, reference 16600, F-series, superlative chronometer officially certified, stainless steel case including oyster bracelet with diver extension, display of hours, minutes, sweep seconds & date under sapphire crystal, unidirectional revolving bezel with minute graduation, screwed-down case back & winding crown, gas escape valve outside 9, calibre 3135, 31 jewels, flat rim balance, flat hairspring, diameter approx. 40 mm, length approx. 21,5 cm, signs of use due to age, original box, papers, Hangtag & lever, sold in November 2006, condition 2, property of a collector, discontinued model