Patek Philippe – Ladies’ Chronograph Ref. 7150/250R-001 Patek Philippe by wholesalewatches - April 7, 20180 In 2009, Patek Philippe introduced the Ladies First Chronograph Ref. 7071 a chronograph intended exclusively for women that marked the debut of a classic manufacture-made chronograph movement (column wheel, horizontal clutch, manual winding) that had been developed entirely in-house. Produced until 2016, this complicated timepiece - highly coveted by