it seems patek 5004 was at first considered a general production piece as like patek 3970, due to the expensive price tag back in the mid 90's, a small supply were produced. Then Patek came out with 5101P, and that caused 5004 production virtually to a st...
When the 5004 was initially introduced I think the earliest records indicate production started with 879500. I own one of the very last 87998x which I believe may have been produced in 2002/3. After the very last watch we presume to be 879999, production ...