Rolex Lady 31 Platinum Ladies 31mm President Watch 178286 - Automatic winding, 31 jewels, Quickset date, sapphire crystal. Platinum case with factory Rolex 48-diamond bezel (31mm diameter). Factory Rolex mother of pearl dial with Roman numerals. Platinum President hidden clasp bracelet (will fit 6-1/4-inch wrist). Pre-owned with large blue genuine Rolex box that doubles as a jewelry box, Rolex scarf, Rolex polishing cloth, hang tag and books, as shown in large photo. This 31mm midsize platinum Lady 31 model is rare and very hard to find. Serial # M979XXX (2007-2008).