Patek Philippe's 175th anniversary watch takes a nostalgic look at the chronograph, recreating the classic chronograph in its original style with three logarithmic scales. With a 37mm white gold case, the silvery opaline dial features a tachymeter, telemeter and pulsometer scale. Each of these concentric scales allows calculation of speed, distance and pulse rate respectively. Between the telemeter and pulsometer scales are 12 baguette-cut diamond indices, with central hour and minute hands indicating the time. The combined chronograph/seconds hand is operated by the start/stop push button on the case at 2 o'clock, while the pusher at 4 o'clock controls the chronograph reset and flyback function. Presented on a blue alligator leather strap, this Patek Philippe chronograph is secured by a fold-over clasp engraved with "Patek Philippe 1839 - 2014".