This Patek Philippe Perpetual Calendar reference 5970J is a landmark grand complication that unites a perpetual calendar with a classical chronograph in an 18k yellow gold case. Built and sold in 2008, it belongs to the final chapter of Patek Philippe’s Lemania based era and has long been regarded as one of the most balanced and charismatic designs in the line.

The case shows the defining traits of the reference with a concave bezel, stepped lugs and square chronograph pushers, all executed with crisp edges and elegant curvature. The dial is perfectly preserved and presents the calendar with exemplary legibility, featuring day and month beneath twelve, a moon phase and date at six, a running seconds register at nine and a thirty minute counter at three, together with discreet indications for leap year and for day and night. A tachymeter scale frames the layout and completes the classical aesthetic.

Inside is the hand wound caliber CH 27 70 Q, derived from the Lemania 2310 and finished to Patek Philippe’s highest standards. The column wheel architecture, polished bevels and elegant bridge work can be admired through the sapphire display back, while the front sapphire crystal is likewise in perfect condition.

This example is offered with an Extract from the Archives and a Patek Philippe folding clasp. The watch remains in very good overall condition with honest signs of wear on case and clasp, sharp and deeply struck hallmarks, a flawless dial and perfectly functioning calendar and chronograph indications. For collectors seeking a definitive yellow gold 5970 with documented provenance and excellent presentation, this piece represents a rare opportunity to acquire one of the most celebrated perpetual calendar chronographs.

---

---