IWC Portuguese Tourbillon Mystère Rétrograde : With an appearance as magical as it is distinctive, the Portuguese Tourbillon Mystère Rétrograde is guaranteed to attract inquisitive glances. Watch lovers will be particularly fascinated by the unusual arrangement of the flying tourbillon, consisting of 82 parts, against a deep black background, creating the illusion that the filigree cage containing the balance is rotating in mid-air. Set in a mirror-finished ring, it resembles an animated “12” and forms the optical centrepiece of the entire dial. The retrograde date display is not only an original complication but also makes a good deal of sense, because a conventional date disc would conceal the tourbillon. After the 31st of the month, it automatically jumps back to the 1st; in shorter months, the hand can be rapidly advanced until it reverts to the 1st. On the right-hand side of the dial, the seven-day power reserve display indicates how much energy remains in the IWC-manufactured 51900 calibre. As befitting a timepiece of this quality, the Portuguese Tourbillon Mystère Rétrograde comes in a glamorous red gold case with a silver-plated dial and in platinum with a dial in ruthenium black.