Sinn Watch 144 St Sa 144.066 Leather Sinn watches continue to impress with their sporty and sophisticated designs, perfect for professional men in need of a reliable and striking timepiece. Found within the bead blasted 41mm stainless steel case of this Sinn 144 St Sa watch is the Valjoux 7750 self winding movement that can be watched hard at work through the open case back. The model also boasts Sinn’s famous Ar-Dehumidifying Technology which enhances functional reliability and freedom from fogging. The bold matte black 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 visibility even in the dark. The Sinn 144 St Sa watch is completed by a black leather strap with white stitch detail and a stainless steel folding clasp for effortless wear and comfort.