This steel, automatic Breguet Marine Big Date is the Ref 5817ST. It features a beautifully hand-engraved (engine-turned) Silver and Blue dial that is mesmerizing. The watch comes with deep blue rubber strap with steel deployment clasp. The see-through case showcases the Caliber 517GG, which is an exquisite Frederic Piguet 1150 modified by Breguet. Complete with box and papers dated in January 2011.