The Portugieser Hand-Wound Tourbillon Day & Night features an 18-carat Armor Gold® case with a diameter of 42.4 millimeters, an Obsidian lacquered dial, gold-plated hands and gold appliques. Thanks to its improved microstructure, Armor Gold® is significantly harder and more wear-resistant than conventional 5N gold alloys. The black and highly polished dial radiates a tremendous depth and creates a beautiful contrast. The flying minute tourbillon at 6 o'clock is one of the most sophisticated ...