Blancpain have released a limited edition Fifty Fathoms watch based on an early 1950’s model, the Fifty Fathoms Aqua Lung. The watch uses an automatic Blancpain movement which has a power reserve of up to four days and a unique blue tinted nautilus shaped oscillating weight. The case is made of steel and the watch features a nylon strap with large holes in it like the original Fifty Fathoms Aqua Lung.