Here are the key specs of the Rolex Explorer 40mm Black Dial :
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40mm Oystersteel case made from durable 904L stainless steel
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Smooth fixed Oystersteel bezel
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Scratch-resistant sapphire crystal
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Water resistance up to 100 meters (330 feet)
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Black dial with iconic 3-6-9 Arabic numerals
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Chromalight luminous hands and hour markers (blue glow)
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No date window for a clean, classic look
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Automatic self-winding movement
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Rolex Calibre 3230
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Approx. 70-hour power reserve
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Superlative Chronometer certified (−2/+2 seconds per day)
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Three-link Oystersteel Oyster bracelet
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Oysterlock folding safety clasp
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Easylink comfort extension for quick size adjustment
