Hollow mechanical watch automatic fashion men's watch $ 39.63 Model: BY-5121 Special function: luminous, decoration Display type: pointer Waterproof: Yes Waterproof performance: 30M Movement type: mechanical Dial diameter: 45mm Thickness: 15mm Crown type: spiral crown Table bottom type: through the bottom Mirror material: mineral strengthened glass mirror Clasp style: pin buckle Buckle material: stainless steel Strap material: leather