Of all the complications in existence, Patek Philippe is perhaps associated the most with the perpetual calendar.

In fact, it was Patek Philippe that for the first time integrated this highly complex mechanism in a watch that could be worn on the wrist in 1925. Since then, Patek has released a wonderful line-up of slim and classy dress watches with a perpetual calendar complication.

The 5139 was introduced in 2008 as the modern reinterpretation of the perpetual calendar wristwatch. Compared to its predecessors, the 5139 featured a larger case, measuring in at a healthy 38 mm, giving this classic watch a decidedly contemporary vibe.

This ref. 5139G dates back to 2012 and is executed in an 18k white gold case with thin straight lugs and Patek Philippe’s iconic Clous de Paris (hobnail) bezel. The case sports a sapphire see-through case back, yielding an uncensored view of the expertly finished ultra-thin automatic movement with a 21k gold micro rotor.
The black lacquered dial features 18k white gold applied baton markers and elegant 18k white gold feuille (leaf) hands. The lovely recessed sub-register at the 9 o’clock position displays the days of the week and a handy 24-hour counter, while the month and the position in the leap-year cycle can be read off of the sub-register at 3. Finally, the lower sub-register incorporates a romantic moonphase indicator that is surrounded by the date functionality.
This exceptional perpetual calendar wrist watch is in excellent condition and comes on a black alligator leather Patek Philippe strap with an 18k white gold Patek Philippe deployant clasp. The watch is accompanied by its original box and papers as well.