A fake Portugieser Hand Wound 42 is easiest to catch at the movement. The real 42 mm hand-wound Portugieser runs an in-house IWC calibre rated for an eight-day power reserve, and that reserve is displayed on the caseback. Many counterfeits hide a generic manual or automatic movement behind a decorated plate, so the watch will not run anywhere near that long. Wind it fully, set it aside, and check it again on day three. If it has stopped, the case is settled before you ever study the dial.
Run the eight-day power reserve test first
This is the single most useful check because it measures function instead of appearance. Wind the crown until you feel steady resistance build, note the time, and leave the watch dial up on a shelf. A watch built around an eight-day calibre should still be running with reserve left when you come back three days later. A watch that dies overnight or within a day is not carrying the movement the seller claims.
Then look through the caseback. The eight-day architecture is visible, and the power reserve indication on the reverse side should move as the mainspring winds down.
- Full wind, then a three-day wait: it should keep running.
- Power reserve display should advance as the watch unwinds.
- Small seconds should sit at 6 o'clock and sweep smoothly, not tick in a stiff one-second jump.
- Winding should feel even and progressive, never gritty, spongy, or slipping.
Movement finish and architecture
Decoration on a fake is often printed or plated, so judge the parts that have to work rather than the stripes. Look for clean Geneva striping with depth, blued screws with properly centred slots, and perlage that follows the plate rather than floating over a stamped surface. Bridges on a genuine IWC calibre sit flush, with sharp bevels on the edges. On replicas the bevels look rounded or painted on, and screw heads are frequently off centre in their holes.
Ask the seller for a short video of the movement running with the caseback facing the camera. A real owner can produce this in minutes. Reluctance here is a stronger signal than any photo of the dial.
Case proportions and finishing
The 42 mm Portugieser hand-wound case is a slim dress watch, and its proportions are hard to copy because the movement underneath dictates the height.
- Diameter should measure 42 mm across the bezel, not at the crown guards.
- Thickness should stay close to the original figure, roughly 11 to 12 mm. A noticeably thicker case usually means a different movement inside.
- Lugs should be sharply defined with crisp edges where polished surfaces meet brushed ones.
- The crown should be signed and sit square to the case, with no wobble when you turn it.
Feel the case sides. Genuine cases are finished consistently, while replicas often show uneven polishing, faint tool marks, or a bezel that catches light differently on one side than the other.
Dial, hands, and printing
The Portugieser dial is deliberately plain, which makes flaws obvious under a loupe. Applied Arabic numerals should be polished and faceted, with sharp corners and even height above the dial. Leaf-shaped hands should be cleanly finished, and any blued steel should show a deep even tone rather than a painted blue.
Check the printing at 10x. Letters on the genuine dial have hard, clean edges and even spacing. Fakes show fuzzy outlines, doubled lines, or lettering that drifts off centre. The rail-track minute ring should be continuous and evenly spaced. The small seconds subdial should be recessed slightly, not a flat disc sitting on top of the dial.
Crystal, caseback, and engravings
A sapphire crystal with anti-reflective treatment gives a faint blue or purple tint at an angle and stays clear from the side. Mineral glass on a fake scratches easily and shows a greyer, flatter reflection. The caseback should also be sapphire on display versions, with the movement readable through it.
Look closely at the engraving on the back. Genuine markings are cut with even depth and consistent letter forms, and the reference and serial numbers must match the paperwork. Mismatched numbers, shallow laser etching, or a font that looks slightly narrow are common faults on counterfeits.
Price, paperwork, and seller behaviour
A hand-wound Portugieser in this size sits in the five-figure range new in US dollars, and used examples hold value. That makes a very low asking price a warning rather than a bargain. Ask for the original box, guarantee booklet, and service history, and confirm that the serial number on the case matches the documents.
- Numbers on the caseback, movement, and papers should agree.
- Serial ranges should be plausible for the production period.
- A timegrapher reading and clear movement photos should be available on request.
- A seller who refuses a return window or an in-person inspection is the risk, not the watch.
Quick checklist
- Does it still run after three days on a full wind?
- Does the power reserve indication move?
- Is the case 42 mm wide and close to original thickness?
- Is the dial printing sharp at 10x magnification?
- Do the caseback engravings match the paperwork?
- Does the winding feel smooth and progressive?
Work through those six points in order. Most fake Portugieser Hand Wound 42 watches fail on the first two, which saves you the trouble of arguing about the rest. When a replica does pass the visual checks, the movement test still decides it, because an eight-day reserve is a design commitment that is difficult and expensive to copy.