Baume & Mercier Riviera Automatic Watch - Chronograph - 43 mm Steel Case - Blue Dial - Blue Rubber Strap43 mm polished and satin finished steel case, 14. 1 mm thick, sapphire crystal back, non rotating bezel, sun satin finished blue dial, Valjoux 7750 self winding automatic movement with chronograph, day date, approximately 48 hours of power reserve, blue rubber strap, adjustable triple folding buckle with security push pieces. Water resistant to 10 ATM (approx. 100 m).