Patek 5146 issue?

[alexvu]

Hi all,

I rencently bought a Patek 5146. As I know, the annual calander can automatically adjusts the date displayed on the timepiece based on 30- and 31-day months to ensure that the correct date is always displayed. This complication requires setting the date once per year, at the end of Februar.

However, My watch won't change the date in November(displayed on 31).

Your assistance in this matter would be greatly appreciated

Here is the photo.