Brand Rolex Model (Watch) Oyster Perpetual 31 Reference number 77080 Automatic winding Case material Steel Strap material Steel Year of manufacture 2004 Condition Used (Very good) original papers, no box Automatic winding Case material Steel Diameter 31 mm Water-resistant 10 ATM Bezel material Steel Glass Sapphire crystal Dial Black Numerals on dial Arabic numerals Strap material Steel Strap colour Steel Clasp material Déployant clasp Material Steel Other Central seconds, Screw-down crown