What a Replica Portugieser Perpetual Calendar Is

A replica Portugieser Perpetual Calendar is a copy of the IWC Portugieser Perpetual Calendar. It mimics the dial layout, case shape, and calendar functions. The best replicas use a modified Asian or Swiss movement to drive the day, date, month, moon phase, and leap year indicators. They do not carry IWC's warranty or service. Use this guide to judge quality.

Prerequisites

  • Know the genuine reference: IWC Portugieser Perpetual Calendar 42 (ref. 3444) or older 44mm models.
  • Study real photos of the dial. Note the subdial positions: month at 3, date at 6, day at 9, moon phase at 12.
  • Set a budget. Good replicas cost 300 to 800 USD. Cheap ones cost less.

How to Evaluate a Replica Portugieser Perpetual Calendar

  1. Check the movement. Ask the seller for the movement name. A common choice is the Asian clone of the IWC 52615. It should have a 7-day power reserve. If the seller cannot name the movement, walk away.
  2. Inspect the subdial layout. The month, date, day, and moon phase must sit in the correct spots. On many fakes, the date window sits too close to the center.
  3. Test the perpetual calendar function. Move the crown to each position. The day, date, and month should change without skipping. The moon phase should advance one step per day.
  4. Look at the moon phase disc. A good replica uses a realistic moon image on a dark blue or black background. A bad one uses a blurry sticker.
  5. Measure the case. The genuine 42mm model is 42mm wide and 13mm thick. A replica that is 1mm larger or smaller will look wrong on the wrist.
  6. Examine the crystal and dial. The sapphire crystal should have anti-reflective coating. The dial should have applied numerals, not printed ones. The hands should be leaf-shaped and polished.
  7. Check the case back. The engraved text must be sharp and centered. The reference number and serial number should match the model year.
  8. Wind and set the watch. The crown should turn smooth. The date change should occur at midnight, not at noon.

Common Flaws to Avoid

  • Wrong subdial spacing. The month and day subdials should align with the 3 and 9 o'clock positions.
  • Missing leap year indicator. The genuine watch has a small window for the leap year cycle. Many fakes omit it.
  • Poor moon phase accuracy. The moon phase should be 29.5 days. A cheap replica uses a 31-day cycle.
  • Plastic or mineral glass. Real replicas use sapphire. If the seller says "hardlex" or "mineral," it is not a top tier copy.

Final Check Before You Buy

Ask for a video of the watch running. Watch the second hand sweep. A smooth sweep points to a high-beat movement. A ticking jump points to a cheap quartz. Request a photo of the case back and movement. Compare those photos to genuine reference images. If the seller refuses, find another seller.