The 7071R-001 is a significant timepiece in the history of Patek Philippe it is the first ladies chronograph. The rose gold watch uses the dedicated manually wound calibre CH 29-535 PS which has an impressive power reserve of 65 hours with the chronograph disengaged. The 1950's style dial has a 30-minute counter at the 3 o'clock position and a sub-seconds counter at the 9 o'clock position. The dial flange under the sapphire crystal is set with 116 diamonds. Here with the silvery-white opaline dial and brown painted hour markers.