Sinn is a brand that originality produced pilot’s watches and this background is reflected in the precision and functionality of Sinn products today. This 656 series watch comes with Swiss-made ETA 2824-2 automatic movement that performs 28 800 vibrations per hour and has 25 bearing jewels. Additional functionalities include pressure resistance, a date window at the 4:30 mark, scratch-resistant sapphire crystal glass with anti-reflective coating, screw down crown with protective horns and long-lasting luminous paint covering the minute and hour hands.