IWC Schaffhausen Portugieser Tourbillon Rétrograde Chronograph 43.5 mm Blue Dial 18k Armor Gold Blue Leather Strap IW394005

Only a few complications in Haute Horlogerie are as fascinating as the tourbillon. The "whirlwind" involves the balance wheel rotating around its axis in a cage. This not only provides a visual spectacle on the dial. The constant rotation reduces the influence of gravity on the oscillation system and increases the accuracy of the timepiece. The Portugieser Tourbillon Rétrograde Chronograph features a flying hacking minute tourbillon at "6 o'clock". Additionally, the model is equipped with a retrograde date display and a chronograph with flyback function. The special edition in a nautical design in dark blue and gold is limited to 50 pieces and available exclusively in IWC boutiques. The case is made of 18-carat Armor Gold®. Thanks to an improved microstructure, this material has significantly higher hardness values than traditional gold alloys. The blue dial, the gold-plated hands and appliqués in 18-carat gold further underscore the maritime character of this exclusive timepiece. The self-winding IWC-manufactured 89900 calibre boasts a power reserve of 68 hours. The pallet lever and escape wheel are treated with Diamond Shell® technology, which reduces friction and improves the flow of energy in the movement.