The Portuguese Tourbillon Mystère Rétrograde is a truly captivating timepiece. It boasts a flying tourbillon and retrograde date display that resets itself at the end of each month. The watch also has a seven-day power reserve indicator, so you'll always know how much energy is left in the IWC-manufactured 51900 calibre. To celebrate the 75th anniversary of the Portugieser watch family, IWC has added a touch of luxury to this mysterious beauty. The front glass has a curved edge, giving the watch a more classic and balanced look. The ergonomically optimized horns make it comfortable to wear, even on slimmer wrists. And let's not forget the stunning alligator leather strap