It takes audacity to call a new watch a classic, but in the case of the Patek Philippe chronograph Ref. 5170J, the attribute is justified. Although it debuts at Baselworld 2010, it has already been at the top of the wish list of many collectors and aficionados for many years – and a popular topic among specialized publications. Now, the time for speculation is over and the object of desire has become reality: the classic men’s wrist chronograph developed entirely by Patek Philippe and crafted exclusively in the manufacture’s workshops.