• Automatic mechanical watch， self-winding， doesn't need battery， environmentally friendly
• Tourbillon design improves the accuracy of time
• Two small working sub-dials: One to display date， and one to display day
• Calendar function: A mini window to display year and month
• Genuine leather strap， comfortable to wear and durable to use
• Back cover hollow-out design， let you see the complex structure of the watch
• Stainless steel case， sturdy in structure and scratch-resistant
• Classic pin buckle， easy to adjust the length