DaVinci is synonymous with renaissance, with science, engineering, and innovation.  Back in the early 1980s, during the dark years of the Swiss watch industry - the name DaVinci came to usher a new generation of thinking to the modern, mechanical wristwatch.  It was the beginning of ‘Haute Horlogerie”.  This time - it was the micro-mechanical genius of Kurt Klaus who devised the solution for the perpetual calendar’s “date program disc”.  This is a crucial component of the Perpetual Calendar for determining the number of the days in each month for a 4-year period - with February at 29 every 4 years.