Patek Philippe's history in perpetual calendar chronographs is nothing short of legendary, and importantly, the 5270 was the very first to feature an entirely in-house movement by Patek. This example, from 2013 sports the rare first series dial with a subtle brushed silver finish that was only produced for around 2 short years. A solid investment for the future, this 5270G-001 is in superb condition and comes totally complete with its polished wood box, Patek Philippe certificate, stylus, and additional solid white gold caseback. The watch benefits from having had a full Patek service through the Patek Geneva Salon in mid-2017.