IWC owes a great deal to Kurt Klaus. After all, he was successful throughout his fifty years with the company and for the past six years has continued to devote much of his time as a developer and inventor. It is precisely for this reason, as IWC opens up a new chapter in the history of the Da Vinci family, that it has decided to pay a tribute to its inventor: the limited Da Vinci Perpetual Calendar Special Edition Kurt Klaus. It contains the original automatic calendar/ chronograph movement used since 1985, except that it is now housed in the new Da Vinci tonneau-shaped style case measuring 43.1 x 51 millimetres. The features and dimensions are the same as those of the new Da Vinci Chronograph, the first Da Vinci in this new generation. The strictly limited edition of this model dedicated to Kurt Klaus consists of 50 watches in platinum and 500 in 18 ct. rose gold. Apart from the familiar date, day, month, four-digit year and perpetual moon phase displays, each of the watches bears Kurt Klaus's signature in the bottom right-hand corner of the dial and a relief engraving of the designer on the back cover. It would be difficult to make the transition from one model to another more elegantly: a farewell as a new beginning.