Short answer
A fake Portugieser Perpetual Calendar copies the IWC Portugieser Perpetual Calendar, a 44 mm dress watch with four calendar subdials, a moon phase, and a seven-day power reserve indicator. No replica in the market carries a true perpetual calendar module. Most use a modified automatic movement with a day, date, and month layout that needs a manual reset after short months, and many show a static year window. Judge the watch on what the subdials do, how the case wears, and whether the seller describes the movement in plain terms. Buy it as a replica, never as an asset.
What the genuine watch does
- Case: 44.2 mm in steel or precious metal, about 15 mm thick.
- Calendar: perpetual, with date, day, month, and a four-digit year window that tracks leap years.
- Moon phase: one display geared to a lunar cycle of about 29.5 days.
- Power reserve: seven days from a twin-barrel in-house calibre, shown on a dedicated dial indicator.
- Dial: applied indices, leaf hands, and four subdials at 3, 6, 9, and 12.
That list is the checklist. Any point a replica fails to match is a visible compromise you can price into the deal.
portugieser perpetual calendar copy
Inspect the calendar first
- Set the date to 30 and wind the hands past midnight; a perpetual calendar rolls to the 1st and steps the month forward.
- Watch the year window while you advance the month; a year that never moves is the most common tell.
- Press the moon phase corrector and note the jump; the disc should step once per day, not sweep with the hour hand.
- Check the subdial printing with a loupe; the numerals should be thin, level, and centered in each subdial.
Movement and power reserve
Most replicas run on a Chinese automatic, often a 7750 base with a calendar plate, or a decorative bridge over a simpler calibre. Ask three questions: what the base movement is, the power reserve in hours, and whether the reserve hand connects to the mainspring. A reserve hand that sits at full for two days is decoration. A real seven-day movement needs about 30 crown turns from empty; a 40-hour movement reaches full in far fewer.
Portugieser Perpetual Calendar Copy: A Quality Guide
Case, dial, and finish
- Thickness: measure with calipers. Anything past 16 mm on a 44 mm case reads as a slab on the wrist.
- Correctors: the side pushers should sit flush and click with a firm press.
- Dial: silver-plated or lacquered finish with no orange-peel texture under raking light.
- Hands: leaf profile, sharp bevels, no burrs at the tips.
- Strap: alligator-grain leather with hand stitching; a printed grain looks flat and plastic.
Questions for the seller
- Ask which movement is inside and who assembled it.
- Request a video of the date flipping at midnight.
- Request a caliper photo of the case thickness.
- Get the return window in writing before you pay.
- Confirm in plain words that the watch is sold as a replica.
A seller who dodges the movement question or calls the watch "identical to genuine" is showing you what after-sales support will look like.
Portugieser Perpetual Calendar Imitation: The Ultimate Guide
Price bands and red flags
Top-tier replicas of this reference land in the high hundreds of US dollars. Under $150 buys a printed dial and a short-reserve movement. Walk away from stock catalog photos with no movement shots, pressure to pay off-platform, and any claim of Swiss origin on a Chinese calibre.
Care and expectations
- Wind the watch at the same time each week; calendar plates dislike sitting stopped.
- Keep it away from magnets, speakers, and tablet covers.
- Service the movement every three to five years, or when the calendar hesitates.
- Do not present the watch as genuine. Selling a replica as an original is illegal in the US.