Rolex, "Oyster Perpetual Date, Sea Dweller 4000ft = 1220m, Superlative Chronometer Officially Certified," Ref. 16600. Fine, center seconds, self-winding, water-resistant, stainless steel diver's Chronometer wristwatch with date, helium escape valve and a stainless steel Rolex Oyster Ref. 93160 extendable Fliplock bracelet. 

Case: Three-body, polished and brushed, screwed-down engraved case back, graduated unidirectional revolving black bezel for the decompression times, Triplock winding crown protected by the crown guard, gas-escape valve at 9, sapphire crystal. Case is in mint condition with sign of wear.

Dial: Black with luminous white gold round, triangular and baton indexes, outer minute/seconds division, aperture for the date. Luminous white gold skeleton hands. Dial is perfect with hands and tritium markers now a light beige but no longer emitting.

Movement: Cal. 3135, rhodium-plated, 27 jewels, straight-line lever escapement, monometallic balance adjusted to temperatures and 5 positions with Microstella timing screws, shock absorber, self-compensating Breguet balance spring, Microstella regulating screws, hack mechanism. Watch works within COSC

Watch is fitted with stainless steel Rolex Oyster bracelet and deployant clasp, all with original box, warranty, and some Rolex literature.  Single owner watch

Reference: 16600

K Serial Circa 2002

Diameter: 40mm Thickness: 15mm

More about Rolex:

Produced for over 40 years, the Sea-Dweller was first designed for deep sea divers at COMEX, and as of 1967 was the first commercially available dive watch to have a helium escape valve. The reference 16600 was introduced to the market in 1978, and has a clean and contemporary look, clearly designed for a specific purpose. Often compared to Rolex's Submariner models, the most noticeable difference between the two models is the lack of magnified cyclops on the crystal above the date window on the Sea-Dweller. The depth rating is another difference - the Sea-Dweller is rated to 4000 feet, which is four times the depth rating of modern Submariners. 

Designed for use by divers, the Sea-Dweller 16600 has become a popular choice for many as an every-day watch, as there is no worry about contact with water. With all of the history and innovation that comes with the Sea-Dweller line, the wearer can feel comfortable knowing that this watch is precise, durable, and water-resistant. Production of the Sea-Dweller ended in 2008, and was brought back in 2014 at Baselworld with the reference 116600.

The above watch appears unpolished and in extremely good condition, it is a one owner watch with a  complete package. A great watch built like a tank.