The Rolex Sea-Dweller 43 mm, introduced in 2017 to mark the collection’s 50th anniversary, redefines modern dive watch excellence. It preserves the Sea-Dweller’s deep-diving legacy while introducing contemporary design updates. Featuring a black Cerachrom ceramic bezel and red “Sea-Dweller” text on the dial, it balances function with refined aesthetics. Its 43 mm Oystersteel case is water-resistant to 1,220 meters thanks to the Ringlock system and helium escape valve. Powered by the automatic Caliber 3235—Superlative Chronometer-certified—it provides 70 hours of power reserve. Rugged, technical, and sophisticated—a true dive-ready icon.
Rolex
Rolex SD43
Case:
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Diameter: 43 mm
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Material: Oystersteel (904L stainless steel)
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Water Resistance: 1,220 meters (4,000 feet), with Ringlock system and helium escape valve
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Crystal: Sapphire with Cyclops date lens
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Bezel: Black Cerachrom ceramic, unidirectional with platinum-coated graduations
Movement:
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Type: Automatic (Perpetual)
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Caliber: 3235, in-house Rolex, Superlative Chronometer-certified
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Accuracy: −2/+2 seconds per day
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Functions: Hours, minutes, seconds, instantaneous date with stop-seconds
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Power Reserve: Approximately 70 hours
Dial & Hands:
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Dial: Deep black with red “Sea-Dweller” text (anniversary edition)
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Hands & Markers: Chromalight luminous for exceptional low-light readability
Bracelet & Clasp:
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Bracelet: Oyster in steel, solid links (22 mm at lugs, tapering to 19 mm at clasp)
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Clasp: Oysterlock folding clasp with Glidelock and Fliplock extension systems
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