Start with the movement

Replica 5159s ship with three movement families. Ask the seller which one is in the watch before you pay.

Fake Patek Philippe 5159 Perpetual Calendar Price: What Each Tier Buys

  • Modified Miyota 9015 with a calendar module on top. Thin, common, repairable.
  • A7750-based builds. Thicker case. The module sits high and is fragile.
  • Clone or custom builds of calibre 324 S QR. Higher price, fewer sellers, needs a service record.

The genuine 5159 runs calibre 324 S QR, self-winding, about 45 hours of power reserve. A replica that lists 28,800 vph and 40 hours is closer to the real spec than one that lists nothing.

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Test the retrograde date

The date hand on the 5159 travels an arc from 1 to 31, then snaps back to 1. Test this before payment. Set the date to 30, advance to 31, then advance again. A correct build returns the hand in one motion. Weak builds drag, stall, or skip. Some replicas ship with a hand that never moves at all.

Fake Patek Philippe Perpetual Calendar 5159: What Reddit Buyers Check

Test the calendar windows

Day, month, and leap-year apertures sit above the moon phase at 6 o'clock. A true perpetual calendar needs one manual correction in 2100. Most replicas use an annual or simple calendar module instead.

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Push each recessed corrector with a plastic pin, never metal. Confirm each aperture advances on its own. Check that the leap-year window steps through four positions, not two.

Parameters to confirm before payment

  • Case diameter: 38 mm. Ask for a caliper photo.
  • Case thickness: 12.5 mm to 13.5 mm. Many replicas run 14 mm or more.
  • Weight on a leather strap: 75 g to 90 g for a plated case.
  • Crystal: sapphire with anti-reflective coating on the inside face.
  • Caseback: hinged hunter cover. Check hinge play and engraving depth.
  • Lug width: 20 mm.
  • Water resistance: 30 m stated. Do not test it.
  • Power reserve: 38 to 45 hours.

Moon phase check

The lunar cycle runs 29 days, 12 hours, 44 minutes. A 30-day disc drifts about one day every two and a half years. Ask for two photos of the moon disc taken two weeks apart. A disc that shows the same phase is decorative, not driven.

Common pitfalls

  1. Photos of a genuine watch. Request a timestamp card next to the case and the movement.
  2. Swiss made claims on a watch under $900. Ask what the movement base is.
  3. Rose gold plating under 5 microns. It wears through at the lugs in months.
  4. No service path. Ask who repairs the watch and what parts are stocked.
  5. Price below $600 for a working retrograde perpetual module. The complication has a cost floor.
  6. Pressure-tested claims with no paperwork. Treat any water resistance figure as nominal.

Questions to send the seller

Movement base and version. Case diameter and thickness measured with calipers. Plating thickness and metal. Photo of the date hand mid-snap between 31 and 1. Photo of the caseback hinge open. Warranty length and who honors it. Return window and who pays shipping.