The Patek Philippe 5370P-001 split-seconds chronograph is one of the three most difficult complications to master, alongside the tourbillon and the minute repeater. It takes a highly sophisticated mechanism to control the two chronograph hands, one of which may be stopped to measure an intermediate or lap time or retain a reference time while the other continues its course unaffected, even by fractions of a second. When released again, the split-seconds hand instantly catches up with the primary hand and the two stacked hands move on together. We are eager to buy your Patek Philippe Grand Complications watch. Sell your Patek Philippe 5271P-001 to us and receive the best possible price.