The Longines Heritage Diver is a modern version of their 1970s dive watches. It has a 43mm diameter, just like the originals. The watch runs on calibre L633.5 and displays the time, date, and seconds on a sleek black dial. The inner flange can be turned with the crown at 2 o'clock and has markings for up to 60 minutes, perfect for divers to track their time underwater. It comes with a black synthetic strap and can be identified by its reference number L2.795.4.52.0.