The chronograph is one of the most complicated manually-wound movements to manufacture. They also make for one of the most beautiful movements on the finishing side.
Leave it to Patek Philippe to take this mechanical concept a step further.
The split seconds chronograph is capable of splitting the seconds hand by halting one seconds hand and letting a second hand continue to advance as a split to time a second event. Let's say you are timing a horse race. You'd start the seconds chronograph at the start of the race. When the first horse completes the lap, you'd split the seconds, halting the first seconds hand to indicate the first horse's time, but leaving the split hand to time the second horse. It's a brilliant complication and extremely elaborate to execute.
What we have here is one of Patek's most beautiful split chronos, the mammoth Reference 5370P. With a stunning blue enamel dial, applied white gold Breguet numerals, a gorgeous calibre CHR 29-535 PS manually wound chrono movement, and an integrated split mechanism in the crown, this piece is one of the most attractive modern Patek pieces in the lineup.
It's absolutely a piece of horological art — a true heirloom piece that gets passed down through the generations.