For Patek Philippe's 175th anniversary, the Swiss watchmaker has revisited the classic chronograph watch. Paying homage to the original form of the ever-popular chronograph with its logarithmic scales, this watch is capable of making multiple calculations. The 37mm rose gold case houses a silvery opaline dial that has three concentric scales: a tachymeter for calculating speed, a telemeter scale for distance, and a pulsometer for pulse rate. A total of 12 baguette-cut white diamonds are set between the telemeter and pulsometer. Two push buttons that sit either side of the crown control the flyback chronograph hand, which also doubles as the seconds hand thanks to the new self-winding chronograph movement, CH 28-520. Presented on a pink alligator leather strap, this special anniversary edition Patek Philippe ladies' watch is secured by a rose gold fold-over clasp, engraved with "Patek Philippe 1839-2014".