Rolex Oyster Perpetual Date Sea Dweller 4000 is an automatic winding mechanical using the Rolex 3185 caliber. The chronometer is COSC certified. The functions of this piece includes hour, minute, second and date.

The three-piece stainless steel case has a diameter of 40mm and a thickness of 15mm. It comes polished and brushed finished. It has very thick sapphire crystal of thickness 3mm which is capable of resisting high pressure.

It is equipped with a pressure compensating valve for helium release. In addition, this piece has counterclockwise turning ring with black ring and graduated scale for the calculation of diving times.

The screw-down crown has threefold gasket and is equipped with case protection. With a screw-on back, this piece is water resistant to 1220 meters.

The black enameled dial comes with luminescent applied round and baton markers finished in white gold. The indication includes a date at 3.

There is a printed minute track and luminescent Mercedes hands in white-gold. The steel oysterlock bracelet has fold-over clasp with Fliplock safety stop.

In order to wear this piece over a diver's suit, this is piece extendable through the supplement of an additional link, and an extension plate of the clasp inclusive of a screwdriver.

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