This pilot's watch convinces by its clear appearance and easy to read dial. It also has some interesting technical features such as magnetic field protection or high water resistance. A PVD-coated 656 S model was introduced in 2004.
In 2008, Sinn introduced a similar model 556 with slightly different finishing and a display caseback. The model 656 was retired from the catalog in 2012, leaving the 556 and new Sinn 856 to take its place.