The fake Portugieser Annual Calendar is a copy of IWC's 44.2 mm ref. IW5035, and the blunt answer is this: no replica gets the annual calendar module or the seven-day power reserve right. What you can buy is a watch that looks close on the wrist, with a triple-aperture calendar at 12 that works to varying degrees and a real running time closer to 40 hours than seven days. Case shape, dial printing and hand finish vary a lot by tier, and those are the things worth judging.
What the genuine watch actually does
The real IW5035 runs the in-house caliber 52850, a twin-barrel movement with Pellaton winding and a genuine seven-day reserve. The calendar shows month, date and day in three arched windows under 12, and it only needs correcting once a year, at the end of February. A power reserve needle sits at 3, small seconds at 9. Case is 44.2 mm across and roughly 15.3 mm thick. Knowing those numbers matters because they are the benchmarks every replica gets measured against.
Where replicas diverge from the original
The calendar is the hard part. Stacking a month disc, a date disc and a day disc into that small arched opening takes a module, and modules add height and friction. Most replicas solve this by simplifying. You will see month windows that advance with the date instead of monthly, day discs that jump late or drift, and quickset positions on the crown that do not match the original sequence. The power reserve indicator is the other weak point. On many copies the needle is decorative, fixed, or tied to nothing. If it moves at all, it often sweeps the full arc in a day or two.
Thickness is the tell you can feel without a loupe. Genuine is about 15.3 mm. Copies built on a stacked module frequently land at 16 mm or more, and the caseback sits proud of the wrist. Weight is usually a few grams light on steel versions because the caseback and rotor are thinner than they should be.
Checks I would run before paying
- Pull the crown to each position and confirm the functions match the real sequence: winding, date correction, time setting. Vague or mushy detents are a bad sign.
- Set the watch to 11:50 pm and watch the date change. It should flip cleanly within a few minutes of midnight, not creep for an hour.
- Wind it fully and time it for three days. If the reserve needle has not budged but the watch still runs, the gauge is fake.
- Look at the small seconds at 9. A smooth sweep at 28,800 vibrations per hour is correct. A visibly choppier 21,600 beat is a cheaper base movement.
- Check the printing under magnification. The IWC wordmark, the Schaffhausen line and the aperture frames should be crisp with no bleed or double edges.
- Ask for a video of the calendar changing, not just still photos. Still shots hide everything that matters.
Price tiers and what they buy
- Under about $200: usually quartz or a crude automatic with painted subdials. The calendar is often a single date wheel behind three printed windows. Skip these.
- $300 to $600: decent case finishing, a real automatic, working day and date. The month disc is typically cosmetic or linked to the date.
- $700 to $1,200: the top tier most sellers call 1:1. Better dial printing, sapphire with coating, engraved rotor, correct 44.2 mm profile. The calendar may genuinely function month by month, but the reserve is still short.
Above that range you are paying for scarcity, not accuracy. There is no version with a true seven-day movement, because building one costs more than the replica sells for.
Living with it
44.2 mm is a large watch, and on a wrist under about 6.75 inches it will overhang. The thickness makes it sit high under a cuff. Strap quality matters more than usual here, since the case is heavy and thin leather will stretch at the lugs within months. Nobody services these movements outside the seller's own network, so treat it as disposable rather than repairable.
The legal and practical side
Counterfeit trademarked goods are seizable at the border in the US, and importing them carries civil exposure. Resale is effectively closed to you, since marketplaces and forums remove replica listings. Buy with that in mind, and do not expect the watch to hold value or to be passed off as genuine anywhere.