5004J, Perpetual Calendar Split Seconds Chronograph, Yellow Gold AOPA Initially released in 3 metals

Initially released in 3 metals

The 25681 was a daring design based on the 36mm calendar

Geneva Seal

This example includes the rarely seen and early ellipse-style deployant clasp alongside its full set

Very few designs can be said to have been unerringly attractive for an entire century without faltering

5004J, Perpetual Calendar Split Seconds Chronograph, Yellow Gold AOPA Initially released in 3 metalsA ref. 5004J, the first production Perpetual Calendar Split Seconds Chronograph, an ultimate conclusion to the development of complicated Lemania architecture. Out of an estimated 1000 examples made across all metals, roughly 300 are thought to be in yellow gold. Reportedly hailed by Philippe Stern as the 'spiritual successor to the 2499', the 5004 is easily amongst the most important and desirable Patek Philippe models ever made. The 5004 embodies a