Hi everyone, Last year, I purchased a Patek Philippe Perpetual Calendar reference 3940 from 1991, as stated in the Certificate of Origin (COO). It is a late 2nd Generation dial with a cross-divider on the leap year and month subdial located at 3 o'clock. ...
that may be age related deterioration of the ink. Alternatively, the area of the dial may have been touched be a tool during a service. In any event it is hardly noticeable on such a beautiful watch.