Fifty Fathoms Bathyscaphe Chronographe Flyback, automatic, Calibre F385 with silicon balance spring, 50-hour power reserve, 5 Hz frequency; black sunburst dial; satin-brushed black ceramic case 43.6 mm; unidirectional black ceramic bezel with Liquidmetal® markers; flyback chronograph with date display and small seconds; water resistance to 300 metres; sapphire case back; black sail-canvas strap with titanium pin buckle.