How do I set a Patek Philippe perpetual calendar?

To set a Patek Philippe perpetual calendar, always turn the crown clockwise. Set the different functions by using the push buttons on the outside of the case, using a toothpick or other tool that won’t scratch or damage the watch. For specific setting and adjustment instructions, consult the brand’s website. On 1stDibs, find a collection of vintage and contemporary Patek Philippe watches.