My husband and I are joining the ranks of Patek Philippe collectors driven by the birth of our son. How do you validate authentic Patek Philippe watches. For example: I am looking at a 5120G in the pre owned market. There are several reference numbers on ...
and on the certificate of origin it is now printed now with the movement number with a slash then the case number. On older watches, only the movement number was printed on the certificate of origin with the case number, movement number, and reference num...
