Main Features: 
• Automatic mechanical watch, self-winding, doesn't need battery, environmentally friendly 
• Double-sided hollow-out design, lets you see the complex structure of the watch
• Golden nail scale, makes the watch more special
• Stainless steel watch case, sturdy in structure and uneasy to scrape, not easy to rust
• Stainless steel strap, comfortable to wear and durable to use
• Folding clasp with safety, convenient to take on and off, it can effectively prevent falling down when you do vigorous exercise
• Fashionable and cool style is perfect for you to wear in daily life or business occasions