Sinn is a brand that originally produced pilot’s watches and this background is reflected in the precision and functionality of Sinn watches today. This 656 series watch is mainly known for its extreme protection from magnetic fields. The watch comes with Swiss-made ETA 2824-2 automatic calibre. It performs 28 800 vibrations per hour and has 25 bearing jewels. Additional functionalities include pressure resistance, a date window between the 4 and 5 o’clock marks, luminous numerals and scratch-resistant sapphire crystal glass with anti-reflective coating.