Core buying advice

Buy a replica Patek Philippe 5320G on three things: the case profile, the dial layout, and the movement architecture. The reference is a 40 mm white gold perpetual calendar with a stepped bezel, syringe hands, applied markers and a micro-rotor automatic caliber, so the replica that gets closest is the one that copies the silhouette and the dial furniture rather than the one with the loudest marketing. Ask for dated QC photos, a timegrapher reading, and a clear statement of which movement sits inside. Treat the watch as a costume piece. It is not a Patek Philippe and it should never be sold, traded or serviced as one.

What to look for

  • Case shape: the 5320G has a stepped bezel, a soft-edged lug and a slim profile. Request a straight-on photo and a side profile. A bulging caseback or slab-sided lugs are the classic tells.
  • Dial layout: subdial, apertures and the day and night display must sit where the reference puts them. Compare against official reference photographs, side by side, at the same crop.
  • Applied markers: look for thickness, bevels and polished edges. Printed markers look flat and dull under raking light.
  • Hands: syringe style, correct length so the tips reach the printed track without overshooting.
  • Moonphase: ask for a photo of the moon disc on a known date and check the position against the actual lunar phase.
  • Calendar logic: ask how the watch behaves at month ends and whether it accounts for leap years. A working perpetual calendar and a decorative display are different products.
  • Movement: micro-rotor automatic, visible through a sapphire caseback. A standard full-size rotor means the case was thickened to hide it.
  • Finishing: brushing direction, bevel consistency, engraving depth on the caseback, and crown detail.

Numbers worth measuring

  • Case diameter: 39.5 mm to 41.0 mm. The genuine reference is 40 mm.
  • Thickness: 11 mm to 13 mm. Anything past 13.5 mm reads wrong on the wrist.
  • Lug to lug: about 47 mm to 48 mm.
  • Weight: white gold is dense. A stainless steel replica feels lighter in the hand, often by a wide margin, and finishing cannot hide that.
  • Beat rate: 21,600 vph if the movement is a plausible copy of the reference caliber. 28,800 vph usually points to a generic base.
  • Power reserve: 38 to 48 hours is the believable band. Ask the seller to demonstrate it.
  • Water resistance: treat every claim as marketing. Do not swim with it.

Pitfalls that cost money

  • Superlative labels. Phrases like 1:1 Swiss or mirror grade describe a sales pitch, not a specification.
  • Borrowed photography. If the listing images match official press shots, the seller never photographed the actual item.
  • Stock movement swaps. The watch in the photos and the watch in the box can differ.
  • Calendar shortcuts. Many cheap perpetual calendars are annual calendars with a hidden correction, or plain displays with no logic at all.
  • Printed dial graphics instead of lacquer over a metal base, which looks chalky in daylight.
  • No QC images, no timegrapher numbers, no return terms.
  • Import and resale risk. Counterfeit goods can be seized by customs, and offering one as genuine is illegal in the United States.
  • Service dead end. A complex calendar module is beyond most independent watchmakers, so a failure may be terminal.

FAQ

Will this pass as a genuine Patek Philippe

No. Weight, finishing under magnification, dial lacquer, movement architecture and calendar logic all differ. Anyone who handles genuine pieces will know.

Is a replica 5320G worth buying

Only if you want the look and accept the limits. Judge it as a watch: does it keep time, does it feel solid, does the calendar behave, can it be serviced?

How do I verify the calendar works

Ask the seller to set it to a known date near a month end and film the change, including February in a leap year and the leap year indication.

Can a local watchmaker service it

Ask before you buy. Many will decline because parts are unavailable and the module is proprietary or simply undocumented.

What matters most on a tight budget

Prioritize case thickness, dial layout and applied markers. Those are visible every day. Movement decoration is the first thing to sacrifice without ruining the look on the wrist.