The Platinum Pocketwatch is treasure that can be obtained in Sly Cooper: Age of Thieves in the episode Alice in Cooperland. It is worth 237 coins and the time needed for players to reach the safehouse is forty seconds.
"This spectacular pocketwatch was once thought to have been lost forever. But now, this priceless trinket can not only tell you when you're late for important dates, but also when it's time for tea. The hand is always stuck at six o' clock for unknown reasons."
This treasure is located at the far eastern section of the park, just behind the White Rabbit Funhouse. Any character is capable of finding and retrieving it.