Rolex Datejust 31mm 18K White Gold 178279 Oyster Factory MOP Roman Dial Fluted Bezel Details: Make: Rolex Model: Oyster Perpetual Datejust 31 178279 18K White Gold Movement:Perpetual Automatic Movement Water-Resistance:100 meters / 330 feet Power Reserve:Around 70 hours Material: 18k White Gold Case Size:31 mm Crystal:Sapphire Crystal with Cyclops lens to view date wheel Dial: Rolex Factory Mother Of Pearl Dial With Roman Numerals Dial function: Date Function Bezel:18ct White Gold Fluted Bezel Bracelet: 18k White Gold Oyster Band