TC Factory Intercontinental 13th Anniversary Celebration: IWC Portuguese Series True Tourbillon Watch! IWCPORTUGIESER HAND WOUND TOURBILLON with Constant Power Manual Winding. This genuine tourbillon seamlessly integrates the enduring modern design of the Portuguese series with a flying minute tourbillon positioned at 6 o'clock. The gold-plated Arabic numerals complement the golden leaf-shaped hands, harmonizing beautifully with the silver-plated dial.1. Exclusively developed 81905 movement with a power reserve of up to 72 hours, replicating the three main features of the authentic model.2. Case designed to faithfully replicate the original one-to-one, restoring the authentic three-piece set. Every detail, from the front and back case shape to the side and arc brushed finish, is perfectly synchronized with the original, with a diameter of 42mm and a thickness of 11mm.3. Sapphire domed crystal.4. Hands crafted at great cost, with multiple iterations from design to molding and inspection to achieve a three-dimensional hand that matches the original.5. Strap made of Italian cowhide with crocodile texture, hand-stitched for meticulous detail, paired with an IWC original folding clasp, featuring clear font on the buckle to replicate the authentic product.ZY production quality assurance.