To pay tribute to its 175th anniversary, Patek Philippe created a collection of 25 limited-edition commemorative timepieces that include the Grandmaster Chime ref. 5175R, the Chiming Jump Hour ref. 5275P, the World Time Moon ref. 5575 and ref. 7175, six Multi-Scale Chronographs under ref. 5975 and ref. 4675, three different sets of four Calatrava watches —a set with cloissoné enamel dials, a set with hand-engraved dials and a set with wood marquetry dials— ref. 5089 featuring motifs of the Lake Geneva Barques and lastly three different pocket watches. One of the celebratory pieces that stands out from the rest is the Grandmaster Chime ref. 5175R which is so far the most complicated wristwatch of the eminent family-owned watchmaking companies and decidedly one of the world's most elaborate wristwatches. This is due not only to the number of complications involved but also to the horological degrees of complexity, two of which have been added to the annals of watchmaking for the first time.