Short answer
The watch people search for as the "Portugieser hand wound 7 day" is IWC's Portugieser Hand-Wound Eight Days. Eight, not seven. That single detail tells you a lot about the listings you will find. Sellers borrow the number from search habits, then print it on a spec sheet for a watch that has no long-reserve movement inside. No first copy at any price delivers a true 192-hour reserve from one barrel. What you can judge is everything else: case shape, dial printing, sub-seconds behavior, caseback finishing, and how honest the listing is about the movement.
What the genuine watch actually is
The reference is built around caliber 59210, a hand-wound movement with a single mainspring barrel wound out to eight days of running time. Thirty jewels, 28,800 beats per hour, hacking seconds, small seconds at six o'clock. Most references put a power reserve indicator on the dial so you can watch the reserve drain across the week. The case sits around 43mm across and roughly 12mm thick, which is not slim, because a long barrel needs room. Sapphire caseback, applied numerals, leaf hands, alligator strap. That is the target a copy is chasing.
Why "7 day" appears everywhere
It is a search phrase, not a factory spec. Plenty of buyers half-remember the number, and listing titles get built around what people type. When a product page proudly advertises a "7 day power reserve" on a replica, treat it as marketing noise. A rep with a Miyota or a decorated Chinese hand-wind will run somewhere near 40 to 50 hours. Ask the seller to state the movement and the measured reserve in hours. Vague answers are your answer.
Where the copies give themselves away
- Reserve. Wind it fully, set it down, check it after three days. If it stopped, the reserve claim was fiction.
- Thickness and weight. Long-reserve movements are chunky. A copy that feels thin and light next to photos of the real thing is hiding a small movement in a big case.
- Dial printing. Look at the brand line and the model text under a phone macro shot. Genuine printing is razor sharp with even spacing. Fakes show thick strokes, uneven kerning, or a logo that sits a hair off center.
- Sub-seconds hand. It should sweep smooth and land cleanly at the markers. Stutter or a hand that is too short reads as cheap from arm's length.
- Caseback finishing. Open the back and look at the bridges. Geneva stripes should be even, not printed. Screws should be blued or polished, not painted.
- Crown. Signed, properly sized, with clean winding action and no grit.
- Power reserve indicator. On copies that include one, check whether it actually moves as the watch runs down. A static hand is a dead giveaway.
A quick inspection routine
- Ask for the movement name and beat rate in writing.
- Request macro photos of the dial text, the sub-seconds hand, and the caseback.
- Confirm hand-wound only. If the listing mentions a rotor, it is the wrong architecture.
- Wind it fully on arrival, note the time, and check it again after 48 hours.
- Time it over a day. Anything past about 15 seconds a day of drift needs regulating or returning.
- Check the strap and buckle fit. Replica straps are the cheapest part of the package and the first thing to fail.
Questions worth asking a seller
Which movement is inside, and is it hand-wound? What is the measured power reserve? Can you send photos of the actual unit, not stock images? What is the return window if the reserve does not match the listing? A seller who handles first-copy stock well will answer these without flinching. The ones who deflect are telling you the watch is a $60 build in a nice box.
Setting expectations by price
At the low end you get a correct silhouette, printed dial text, and a short reserve. Step up and you get applied markers, a properly decorated caseback, and a movement that holds a tune. Nobody in the replica market has cloned an eight-day barrel, so pay for the look and the finishing, not for a reserve number that will never arrive. The Portugieser is a dress watch read at conversation distance. Get the proportions, the printing, and the hand sweep right and it does its job.
Bottom line
Ignore the "7 day" label. Focus on the four things you can verify: movement type, measured reserve, dial execution, and caseback finishing. That is where a good first copy separates itself from a bad one, and it is the only part of the spec sheet you can actually test on your own wrist.