Premium Miyota 82S0 Japanese Automatic movement. Twenty-One jewel three hand with a multidirectional tungsten fly wheel winding system with a +40 hour power reserve. 40mm, 100M/10ATM custom solid stainless steel case with bold crown with fine coin-edge texture. Slightly domed crystal design with screw down case back with window into movement. 20-18mm tapered custom solid stainless steel 5-link bracelet with stainless steel double locking clasp with micro adjust.