Automatic Mechanical Watch Multifunctional Hollow Luminous Men's Watch $ 41.50 Details Special function: Tourbillon Display type: pointer Waterproof: Yes Waterproof performance: 30M Movement type: mechanical Dial diameter: 41mm Thickness: 12.9mm Crown type: spiral crown Table bottom type: through the bottom product material Mirror material: stainless steel Strap material: stainless steel Case material: stainless steel