Girard-Perregaux, Three Bridges Tourbillon, Men's Watch, 18K Rose Gold Case, Leather Alligator Strap, Swiss Mechanical Automatic (Self-Winding), 99270-52-000-BA6A. Brand Name: Girard-Perregaux Collection: Three Bridges Country of Manufacture: Switzerland Band Material: Alligator-Croc Case Width: 45 mm Case Back: Sapphire Crystal See Through Case Depth: 11.55 mm Crystal: Sapphire Crystal Scratch Resistant Material: 18K Rose Gold Shape: Round Water Resistance: 30 m (100 feet) Caliber: GP09400-0001