The Rolex Oyster Perpetual Sea-Dweller 4000 reference 16600 dive watch features a 40mm stainless steel case surrounding a black dial on a stainless steel Oyster bracelet with folding buckle; the Rolex Oyster clasp includes a Rolex Fliplock dive extension. Functions include COSC Swiss chronometer certification, unidirectional dive bezel, 1220-meter water resistance rating, helium escape valve (gas escape valve) hours, minutes, seconds and date. The watch also measures 14.6mm in thickness and 47.3mm from lug-to-lug.

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