For over 200 years, a whirlwind ? for that is the literal translation of the French word ?tourbillon? ? has been blowing through the world of watchmaking. Since then, this delicate little mechanism has been the benchmark for the world?s best watchmakers. Even if the tourbillon has lost much of its original raison d?etre, it is still an almost magical experience to see the tiny mechanism moving in space against a black background, completely free and apparently detached from any form of drive. In the case of the Portuguese Tourbillon Mystere in 18 ct. white gold, available in a limited edition of 250 pieces, the warm golden colour of the balance rim is in striking contrast to the cool radiance of the case and the slate-grey ?ardoise? dial, with its small stop seconds and seven-day power reserve display. The transparent sapphire glass back cover provides an unimpeded view of the large 50900 calibre movement.