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Reference
228239
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Bracelet
President, semi-circular three-piece links
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Movement
Perpetual, mechanical, self-winding
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Water Resistant
Waterproof to 100 metres / 330 feet
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Calibre
3255, Manufacture Rolex
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Bezel
Fluted
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power-reserve
Approximately 70 hours
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Dial
Olive green
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Certification
Superlative Chronometer (COSC + Rolex certification after casing)
Fluted bezel
The Rolex fluted bezel is a mark of distinction. Originally, the fluting of the Oyster bezel had a functional purpose: it served to screw the bezel onto the case helping to ensure the waterproofness of the watch. It was therefore identical to the fluting on the case back, which was also screwed onto the case for waterproofness, using specific Rolex tools. Over time, the fluting became an aesthetic element, a genuine Rolex signature feature. Today the fluted bezel is a mark of distinction, in gold on this Day-Date 40.





