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See here...https://www.scribd.com/doc/294942633/Analysis-of-Poem-17-by-Jose-Garcia-Villa

A rattrapante chronograph also known link as a split-seconds complication enables the timing of two separate intervals of elapsed link time via a pair of central chronograph seconds hands that are mounted together. They start link at the same time but can be stopped individually in order to track exact split time. The most commonly cited real-life benefit Tracking lap time in a race. A Reddit user once built a split-seconds complication out of Lego if you need help visualizing the above.

Last but not least we bring you something bigger. A Patek T2 modular timing link system. No it doesn't fit on Arnault's wrist link but represents Patek's serious dive into quartz timing devices. link It is a modular piece and was used in a German nuclear power plant for decades. Soon it will either adorn Jean's office or home wherever it will fit.