Blancpain Fifty Fathoms Bathyscaphe Chronographe Flyback 5200 0130 NABABlancpain Fifty Fathoms Bathyscaphe Chronographe Flyback 5200 0130 NAB A 5200 0130 B52 A Born in the late 1950s from a desire to offer a diver's watch in a size suited to daily wear, the Bathyscaphe was reinterpreted by Blancpain in 2013. This year, the timepiece that is equally at home under water and in chic urban settings takes on board a new self winding F385 movement featuring a flyback chronograph function.