The fast answer: with any IW3714 offered as genuine, verify the movement before you judge the case. The reference name covers IWC's Portugieser Chronograph family, a watch copied at every price tier, and the copies that fool people are the ones with convincing dials wrapped around a movement that does not belong there. Ask for a sharp photograph of the calibre through the caseback, a photograph of the reference and serial engraving, and the service record. If the seller will not supply all three, stop. What follows is a guide to catching a counterfeit, not a guide to buying one.
Lock in the genuine specification first
You cannot spot a deviation until you know the baseline. Most Portugieser Chronograph IW3714 executions share these figures, and you should confirm the exact reference against the manufacturer's own archive before you compare anything:
- Case diameter: 40.9 mm, with a thickness around 12.3 mm
- Strap width: 20 mm at the lugs
- Water resistance: 30 m, which means splashes rather than swimming
- Crystal: sapphire, with anti-reflective coating on both faces on most examples
- Movement: calibre 79350, a Valjoux 7750 base reworked by IWC, running at 28,800 vibrations per hour with roughly 44 hours of power reserve
- Layout: 30 minute counter at 12, small seconds at 6, date aperture at 3
Dial and hands
The Portugieser dial is austere, which is exactly why small errors stand out. On a genuine dial the Arabic numerals are applied, with crisp edges and a polished bevel, and the printing is flat and dense rather than grey or fuzzy under magnification. The feuille hands taper to a fine point and sit close to the dial; on many replicas the hands are too thick at the base or sit visibly high above the surface.
Check the subdial geometry. The two counters should sit on the vertical centre line, with even spacing and no crowding toward the date window. Replicas commonly place the 30 minute counter slightly off centre, or use a subdial hand that is too short to reach the minute track. Look at the date aperture as well: the cut should be sharp, the wheel aligned, and the font consistent with the era of the reference. A crooked or oversized date window is one of the most common tells.
Case, crown, and pushers
The case should feel dense for its size and show even brushing on the flanks with a polished bezel that meets it in a clean line. Replica cases often carry a soft or rounded transition between brushed and polished surfaces. Pushers are the other frequent weak point: on a genuine chronograph they travel with firm, short resistance and snap back cleanly. If the pushers feel spongy, grind, or require a long throw, the movement underneath is not a 79350.
Movement and caseback
Ask for a macro shot of the movement. On a genuine 79350 you want to see a signed oscillating weight, machine-applied decoration that follows the contours of the bridges, and jewelled pivots set cleanly. Replicas usually show a stock 7750 with a stamped rotor, or a quartz movement hidden behind a decorative plate. Note that some executions carry a sapphire display back while others use a solid engraved back, so confirm which type belongs to the exact reference and year before you treat a solid back as evidence of anything.
Engraving is a reliable checkpoint. Reference and serial numbers on a genuine caseback are cut, not printed, with consistent depth and no burring. Compare the number on the caseback with the number on any card or certificate. A mismatch, or a serial that does not correspond to the reference, ends the conversation.
Seller checks that matter more than photographs
- Ask when the watch was last serviced and by whom, then ask for the paperwork.
- Request photographs taken at an angle, in daylight, with the crown pulled and the chronograph running.
- Confirm the return window in writing before payment.
- Pay by a method that can be reversed if the watch fails inspection.
- Budget for an independent inspection by a watchmaker who handles IWC calibres.
Common pitfalls
- Buying from a listing that shows only front-facing photographs. The dial is the easiest part to copy.
- Trusting a box and papers as proof. Packaging is widely reproduced and proves nothing about the watch.
- Ignoring thickness. A case that measures more than about 13 mm at the wrist is a warning sign.
- Assuming a display back guarantees authenticity. Decorative plates imitate an exhibition caseback well enough to fool a phone camera.
- Skipping the inspection to save time. A service centre quote on a counterfeit is money spent for nothing.
FAQ
Does the IW3714 have a date?
Yes. The date aperture sits at 3 on the Portugieser Chronograph, paired with a 30 minute counter at 12 and small seconds at 6. A no-date dial on a watch sold as this reference deserves an explanation.
What movement should be inside?
Calibre 79350, an IWC-reworked Valjoux 7750 with roughly 44 hours of power reserve. A quartz tick, a smooth sweeping seconds hand at 6, or a rotor with no IWC signature are all disqualifying.
Can IWC confirm a watch is genuine?
An authorised service centre can inspect a watch and quote for service, and that inspection is the strongest evidence you will get. Treat any verbal assurance from a private seller as unverified until an independent watchmaker has opened the case.
Is a low price the only warning sign?
No. Counterfeits are routinely priced close to market to avoid suspicion, so price alone tells you little. The movement, the engraving, and the seller's willingness to allow inspection carry far more weight.