The Patek Philippe references 5170 and 5172 represent the modern evolution of the manufacture's manually wound chronograph, continuing a lineage that stretches back through celebrated references such as the 1463, 130 and 5070. While each model has its own distinct personality, both embody Patek Philippe's philosophy of combining traditional chronograph architecture with exceptional hand finishing and timeless design. Together they demonstrate the manufacture's commitment to preserving the classical manually wound chronograph at a time when such movements had become increasingly rare within haute horlogerie.

Introduced in 2010, the reference 5170 marked a significant milestone as the first standard-production chronograph to be powered by Patek Philippe's fully in-house manually wound Calibre CH 29-535 PS. Featuring a traditional column wheel and horizontal clutch, the movement incorporated numerous patented innovations to improve precision, efficiency and reliability while maintaining the elegant architecture expected of a classical chronograph. Produced in a variety of precious metals and dial configurations throughout its production, the 5170 is admired for its restrained Calatrava-inspired styling and its role in establishing a new generation of in-house Patek Philippe chronographs.

The reference 5172 succeeded the 5170 in 2019, retaining the celebrated CH 29-535 PS movement while introducing a more vintage-inspired aesthetic. Its stepped lugs, box-style sapphire crystal, syringe hands and pulsometer scale pay tribute to Patek Philippe's historic chronographs of the 1940s and 1950s, giving the watch a warmer and more sporting character than its predecessor. Although mechanically very similar, the 5172 reflects a shift towards historical design cues that has become a defining characteristic of Patek Philippe's contemporary collections.

Together, the references 5170 and 5172 illustrate the evolution of Patek Philippe's modern manually wound chronograph. The 5170 introduced the manufacture's landmark in-house chronograph calibre in a clean, contemporary dress-watch design, while the 5172 reinterpreted the same exceptional movement through the lens of vintage-inspired styling. Today, both references are regarded as outstanding examples of traditional Genevan chronograph watchmaking, admired for their technical excellence, impeccable finishing and their important place within the continuing history of Patek Philippe's most celebrated complication.