What is a replica Patek Philippe perpetual calendar 5159?
A replica Patek Philippe perpetual calendar 5159 is a copy of Patek Philippe's 38mm officer style perpetual calendar, a watch that shows the day, month, leap year cycle, moon phase and a retrograde date. First copy versions imitate the dial layout and silhouette, but they are not made by Patek Philippe and run third party movements.
The genuine reference 5159 arrived in 2007 in white, rose and yellow gold plus platinum, and it is one of the brand's best known dress perpetual calendars.
How does the genuine 5159 work?
The real watch runs Patek's 315/324 S QR family of self winding movements, a perpetual calendar that mechanically tracks 28, 30 and 31 day months and adjusts for leap years. The date sits on a retrograde arc instead of a hand circling the dial, and day, month and leap year appear in dial apertures.
Because the mechanism is mechanical, the calendar stays correct only while the watch keeps running. When it stops for a long period, a watchmaker resets it rather than the owner.
Do replica 5159 watches have a real perpetual calendar?
Most do not. The great majority of first copy perpetual calendars use an annual or complete calendar module that advances at midnight and jumps from February 28 to March 1, so the owner resets the watch every February.
Even the better replica versions rarely handle February 29 correctly, which is the clearest tell when comparing a copy with the real movement.
What should you check before buying?
- Case size: the genuine case is 38mm wide, while copies often run 39mm to 41mm and wear visibly larger on the wrist.
- Case back: the original has a hinged officer style cover over a sapphire display back, and many copies fake the hinge or use a solid back.
- Dial printing: subdial spacing, the moon phase disc near 6 o'clock, and the sharpness of the applied markers.
- Function: set the date yourself and confirm the retrograde date snaps back cleanly at month end instead of sticking or skipping days.
- Weight and finish: an 18k gold case weighs noticeably more than gold plated steel of the same size.
Is buying a first copy 5159 legal in the United States?
Owning a replica is not the main legal risk, but importing and selling counterfeit goods that carry a protected trademark is. U.S. Customs and Border Protection can seize shipments of counterfeit watches, and passing a copy off as an original is trademark counterfeiting under federal law.
Patek Philippe and its authorized service centers will not service or authenticate a replica, so any repair work has to go to an independent watchmaker.
Is a replica 5159 worth it?
If the goal is the look of a six figure perpetual calendar on a modest budget, a first copy 5159 delivers the case shape and dial layout at a tiny fraction of the price. It will not hold value, it will not be serviced by the brand, and the calendar needs resetting every year.
Buy only from sellers who describe the watch honestly as a replica, and expect a generic automatic movement rather than a Patek calibre.