Men's Double Tourbillon Multi-function Automatic Mechanical Watch

Product information:
Color: AL-8831-L1 black shell black face Band, AL-8831-L2 black shell blue face Band
Thickness: 13mm
Waterproof performance: 30m
Movement type: Machinery
Crown type: Spiral crown
Case back type: transparent bottom
Mirror material: mineral reinforced glass mirror
Buckle style: pin buckle
Watch-buttom material: Stainless steel
Strap material: genuine leather