One of the great classics of modern Patek Philippe production, reference 5004 was issued between 1994 and 2010. It is the first Patek Philippe serially produced perpetual calendar chronograph wristwatch with moon phases - a set of complications rooted in the history of the brand, the first model made in series being reference 1518 launched in 1941 - with the additional split-second complication. Together with reference 5070, it is the last Patek Philippe model to employ an outsourced, Nouvelle Lemania based calibre. The aesthetics of the watch are based on reference 3970 (itself based on the iconic ref. 2499), with subtle differences: the dial features Arabic numerals instead of the baton ones usually found on the ref. 3970; the case is thicker and 0.8 mm larger, granting it a much more important wrist presence, while still remaining very elegant and understated. Practically, the presence of the 24 hours and leap year cycle indications - already seen on its non-split inspiration - are enormously useful when it comes to setting the watch, and result a more intricate, but never encumbering, dial design.

The present example is a highly attractive and collectible specimen for a number of reasons. The close to as-new condition and the presence of its original sale kit are already highly appreciated features, but the fact that this example is in rose gold makes it a true gem. The model was serially produced in the three golds and platinum, plus one titanium example and a number of stainless steel pieces made with the last calibre available. Out of the four "standard" materials, pink gold appears to be one of the most scarce, with a total production estimated at around 200 example of which so far are known from the market. Furthermore, this is one of the earliest specimes ever produced, belonging to the first batch of movement (nos 879'500 to 879'999)