A replica Portugieser Annual Calendar copies IWC's 44.2mm Portugieser with the three arched apertures at 12 o'clock. Top-tier versions sell for roughly $400 to $700, and they get the case profile, dial layout, and hand shape close enough that nobody at arm's length will blink. The one thing they do not copy is the calendar logic. A real one rolls past 30-day months on its own. Most replicas need a pusher or a manual correction on the first of the month. That gap is the whole story.
What the genuine watch does
IWC put the Portugieser Annual Calendar into the line in the mid-2010s. The case is 44.2mm across, about 15.3mm thick, and the display is unusual: month, date, and weekday sit side by side in three arched windows under 12 o'clock, small seconds runs at 9, and the power reserve indicator sits at 3.
portugieser perpetual calendar replica
Inside is caliber 52850, a Pellaton-wound automatic with twin barrels and a seven-day reserve. An annual calendar knows which months have 30 days and which have 31. It self-corrects from January through December and only needs a nudge once a year, in February or early March.
How replicas handle the calendar
This is where the money goes, and where corners get cut. Almost every replica starts with a modified Asia 7750 or a custom calendar module bolted on top of a stock movement. The windows at 12 will show the right information, and the discs will advance when the date flips. What usually breaks is the 30-to-31 handoff.
- Entry builds: three static or semi-static discs driven off a plain date wheel. You correct with a pusher or a recessed corrector on the case flank.
- Mid builds: a working module that advances month and weekday discs together with the date, but still needs a manual push at the end of a 30-day month.
- Top builds: the closest thing to the real logic, with a properly geared module. Even here, I would want to see a video of the rollover before trusting the claim.
Ask a seller one question: what happens on April 30? If the answer is vague, the calendar is decoration.
The seven-day problem
The dial says seven days. A 7750-based replica runs 40 to 48 hours. Many builders scale the power reserve hand so it looks plausible, or wire it to a spring that never really tracks the mainspring. Genuine 52850 uses two barrels in series to reach seven days, and that architecture is expensive to clone. Treat any replica advertising a true seven-day reserve with suspicion unless the seller names the movement and stands behind it.
Details that separate the tiers
Case thickness is the first tell. A stock 7750 plus a calendar module often pushes past 16mm, and the watch wears like a brick compared to the real thing. The rest comes down to finishing.
- Applied numerals with sharp edges, and a clean rail track on the dial
- Aperture edges that are crisp and evenly spaced, not stamped and soft
- Leaf hands with the right curve and a proper blue or rhodium finish
- Sapphire crystal with anti-reflective coating on both sides
- A display caseback with legible engraving and a movement that looks finished, not raw
- Crown size and shape matching the case or the whole silhouette reads wrong
If the seller will only send stock photos, move on. Ask for the date window and the caseback, shot in daylight, at an angle.
Price tiers, in plain terms
- $150 to $250: entry tier, mineral glass, cheap plating, fake windows, quartz or a low-grade automatic
- $300 to $500: the value zone, Asia 7750 with a calendar module, decent dial work, sapphire
- $600 to $900: top tier, best case machining and dial printing, closest movement to the original
The genuine article runs well past $20,000 depending on the case metal, so the price gap is not subtle. That is also why a $200 copy rarely survives a side-by-side comparison.
Before you buy
- Get a video of the calendar advancing, not a photo.
- Ask what movement is inside and what the real power reserve is.
- Request case flank photos so you can see if there are extra corrector pushers.
- Confirm a return window in writing.
- Check the caseback yourself for spelling and reference number errors.
One legal note
Owning a replica is not a crime in the United States. Importing counterfeit goods is, and selling them is. Customs can seize a shipment, and you can lose the money you paid. That is a real risk worth weighing before checkout, no matter how good the photos look.