If you need to buy masks, only 0.6 USD per piece, click here, also have N95 masks, if you need, please contact us. Model case Crystal Scratch-resistant sapphire, Cyclops lens (2.5x) over the date Water-resistance Waterproof to 100 metres / 330 feet Model case Oyster, 31 mm, Everose gold Bezel Fluted Diameter 31 mm Winding crown Screw-down, Twinlock double waterproofness system Oyster architecture Monobloc middle case, screw-down case back and winding crown Material 18 ct Everose gold Movement Calibre 2235, Manufacture Rolex Model case Perpetual, mechanical , self-winding Winding Bidirectional self-winding via Perpetual rotor Precision Officially certified Swiss chronometer (COSC) Functions Centre hour, minute and seconds hands. Instantaneous date with rapid setting. Stop-seconds for precise time setting Bracelet Clasp Concealed folding Crownclasp Bracelet material 18 ct Everose gold Bracelet President, semi-circular three-piece links Dial Gem-setting Diamonds in 18 ct gold settings Dial Black set with diamonds An ode to passion and beauty, the Oyster Perpetual Datejust Lady 31 offers a contemporary blend of colours and materials in a 31 mm size, while remaining firmly anchored in the lineage and timeless elegance of Rolex’s iconic Datejust.