Sinn Watch 556 I Vintage Cowhide Vintage Brown. 556.010 Sinn watches are famed for their aviation inspired timepieces and this Sinn 556 I watch continues this tradition by bringing to life an aesthetic reminiscent of cockpit navigation clocks and their rapid and clear readability. The satinized stainless steel case measures to 38.5mm in size and houses the ETA 2824-2 self winding movement. This stunning Swiss made calibre equips the Sinn watch with hours, minutes and seconds function, a date display at 3 o clock and a power reserve of 38 hours. This Sinn 556 watch is the perfect choice for someone looking for a watch that will effortlessly go between day and night occasions. Scratch resistant and antireflective sapphire crystal glass protects the glossy black dial and like most Sinn watches, the dial features hands and indices coated in white luminescence for easy legibility in the dark. This Sinn 556 I watch is also armed with a screw in crown to assist in its 200 metres water resistance and an exhibition case back that shows off the complex automatic movement. To complete the look of this Sinn pilot watch, a vintage brown cowhide leather strap is added alongside a classic stainless steel buckle.