Patek Philippe Caliber 31-260 PS FUS 24H

The Patek Philippe caliber 31-260 PS FUS 24H is 24 hour display, dual time zone automatic movement with a micro-rotor.

Setting the time:

The calibre 31-260 PS FUS 24H has 3 crown positions:

• Against the case – Manual winding
• Pulled out one click – Local time adjustment, can be adjusted in both directions, jumps the local time hand in one hour increments, seconds are not hacked
• Pulled out two clicks – Setting the main time on the dial, seconds are hacked

Accuracy Rating:

Patek Philippe states that the accuracy of PP calibers measuring 20mm or over (such as the one being discussed on this page), have a rating of -3 to +2 seconds per day.

Here is what the brand says about accuracy:

“The precision of a watch is determined by how accurately it keeps the time. A watch that is fast or slow is considered precise if its gain or loss remains constant. Such a deviation can be easily corrected. Consequently, the final test of accuracy takes place on your wrist. Your temperament or the nature of your physical activities can cause slight irregularities. Fluctuations in position, temperature, or air pressure, the presence of magnetic fields (as produced by most electronic devices, metal detectors, household appliances, etc.), as well as vibrations and other factors may also affect its accuracy.” –Source (page 15)

Additional Resources:

• Official Patek Philippe 31-260 PS FUS 24H page
• Official instruction manual (pdf)