SISTEM51 THE MECHANICAL REVOLUTION Purchased December 16, 2018 The SISTEM51 is at the heart of Swatch's design philosophy, featuring a movement composed of only 51 parts, the only one in the world with a fully automated production process. Boasting an exceptional 90-hour power reserve and outstanding antimagnetic properties, this Swiss-made self-winding mechanical masterpiece has revolutionized the world of automatic watches. Diameter: 42.00 mm Thickness: 13.80 mm Distance between lugs: 50.60 mm Strap material: Leather Clasp material: Stainless steel Strap buckle: Half buckle Case material: Stainless steel Color: Blue Strap color: Blue Dial color: Blue Case color: Gray Product category: IRONY 7610522787803 YIS420 SWISS MADE