Seeing as this is the year of the Da Vinci for IWC, it is only right that we mention Kurt Klaus, as he was the man responsible for putting the collection on the map in 1985 when he created an autonomous perpetual calendar module for the Da Vinci watch. Klaus began his tenure at IWC more than 60 years ago and, besides the perpetual calendar module, he was also the man leading the design of the Calibre 5000 movement that debuted in 2000. Although he officially retired from IWC Schaffhausen at 65 (he is now in his eighties), he still remains active within IWC, promoting an understanding and appreciation for the mechanisms inside some of the most complex IWC watches. In honour of all that Klaus has done for IWC, the manufacture produced a limited edition Da Vinci Perpetual Calendar Edition Kurt Klaus back in 2007. Only 600 pieces were made available, 500 of those in gold, 50 in platinum and a further 50 in white gold.