Sinn Watch 240 St GZ Vintage Cowhide Brown. 240.011 Sinn watches continue to impress with their sporty and sophisticated designs that are perfect for professional men in need of a reliable and striking timepiece. Found within the 43mm bead blasted stainless steel case of this Sinn 240 St GZ watch is the SW 200-1 self-winding movement which is kept hidden behind a screw down case back.  This impressive movement equips the timepiece with hours, minutes and seconds function, a day and date window, 26 bearing jewels, 28,800 semi oscillations per hour and a power reserve of 38 hours. The striking ocean blue 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 German manufacturer has enhanced this Sinn 240 St GZ watch with their famous D3 System crown and a water resistance of 100 metres. To complete the look of this Sinn 240 St watch, a luxurious vintage brown calfskin leather strap is added alongside a stainless steel buckle.