First introduced in 1994, reference 5004 is distinguished by its complex perpetual calendar function with a split seconds complication. Widely considered one of Patek Philippe's most iconic models, it was replaced by reference 5204, which features an in-house movement. An application piece, it was at the time incredibly difficult to be granted the privilege of purchasing one: the intricacy of the split second module added to the already complex perpetual calendar chronograph and the enormously high finishing standard of the company commanded an incredibly slow production rate. It is estimated that about 200 platinum examples left the company workshop; this already small number is even more remarkable given the decades long production run of the piece.

Ref. 5004, 5004P-061,5004P ,5004R-014,5004P-001, Etc.