Sinn Watch 556 I Mother of Pearl S. 556.0105 Grey Alcantara Leather Strap. Sinn watches continue to impress with their sporty and sophisticated designs, perfect for professional men and women in need of a reliable and striking timepiece. Found within the sanitized 38.5mm stainless steel case of this Sinn 556 I Mother of Pearl S watch is the SW 200-1 self winding movement which is proudly displayed through the open case back.  This impressive movement equips the timepiece with hours, minutes and seconds function, 25 bearing jewels, 28,800 semi oscillations per hour and a power reserve of 38 hours. The mesmerising black mother of pearl dial is unmissable beneath the scratch resistant sapphire crystal glass with antireflective treatment, and like many Sinn watches, the dial also boasts indices and hands coated in luminescent colour for optimal legibility even in the dark. Having become famed for their fully equipped timepieces, the brand has enhanced this Sinn 556 I Mother of Pearl watch watch by ensuring it has a water resistance of 200 metres and is anti-magnetic and shock resistant according to the DIN or German Institute of Standardization. To complete the look of this Sinn 556 watch, a luxurious grey Alcantara leather strap is added alongside a stainless steel buckle.