If you are searching for a fake IW371649, you are usually trying to answer one of two questions: is the watch in front of me genuine, or how close does the best replica of this IWC reference actually get. The short answer is that IW371649 is a real IWC reference in the Portugieser Chronograph series, and most fakes give themselves away at the caseback engraving, the dial printing, and the chronograph movement long before anyone notices the silhouette.
What the IW371649 Reference Is
The 3716 group of reference numbers belongs to the IWC Portugieser Chronograph, a stainless steel chronograph with two subdials, a slim bezel, and a dial that borrows its layout from pocket watch design. Because the reference family has been updated over the years, two watches that share the same style can use different movements, different case thickness, and different dial details. That is exactly why fakes in this line are hard to judge from a photo alone, and why the reference number on the caseback matters more than the look of the dial.
Before comparing any watch, pull up the official reference information for the exact number and production era. Numbers, fonts, and calibre assignments change between generations, and a replica maker working from an old catalog photo will often mix details from two generations into one watch.
How to Check an IW371649 Before You Buy
Caseback and engraving
- Reference and case numbers should be engraved in the format IWC uses for that series, in the correct position on the back.
- Under a 10x loupe, genuine engraving looks cut into the metal with clean edges. Many fakes look shallow, slightly fuzzy, or filled with residue.
- Check the screw heads, the caseback notches, and the seam where the back meets the case. These are machining details that cheap replicas rarely match.
- Compare the case thickness and lug shape against the official spec. A fake often runs thicker or has softer lug edges.
Dial, hands, and printing
- Applied indices should sit flat, with sharp polished edges and even height around the dial.
- Printed text should be crisp and evenly spaced, with no ink bleed into the dial surface.
- Subdial rings, hand lengths, and the date aperture edge are common tells. Replicas frequently get the hand length or the ring thickness slightly wrong.
- The date should align cleanly in the window and change at the right point when you set the time forward.
Movement and feel
- Winding should feel smooth with a steady resistance. A gritty or overly loose crown is a warning sign.
- Chronograph pushers should have a defined, consistent click. Mushy travel or a spongy reset points to a generic movement.
- Listen to the rotor. A rough or rattling spin is typical of low grade automatic movements used in replicas.
- Ask a watchmaker to open the back. No photo check replaces looking at the movement, the finishing, and the balance assembly.
Crystal, coating, and lume
Anti-reflective coating on both sides of a sapphire crystal gives a faint blue or neutral glare depending on the light. Cheap fakes show a heavy, flat reflection instead. Lume should glow evenly across the markers and hands, not in patches, and it should fade slowly rather than dying within minutes.
What the Super Clone Market Actually Delivers for This Reference
High end replicas of the Portugieser Chronograph have become visually convincing at arm's length. Case proportions, dial color, and hand shapes are usually close. The gaps show up in three places: the movement, the caseback finishing, and the small print on the dial.
- Movement: almost every replica uses a clone or a modified generic chronograph movement. It will not match the finishing, service intervals, or long term accuracy of the original calibre.
- Caseback decoration: engraved text, perlage, and rotor finishing are the last details replica factories perfect, so they are the first place to look.
- Dial text: letter spacing, font weight, and the crispness of the printing at high magnification.
- Legal and shipping risk: buying or importing a counterfeit watch carries real risk in many countries, including seizure at customs.
Price and Paperwork Sanity Checks
- Compare the asking price to current secondary market listings for the same reference. A genuine watch offered far below market is either fake, damaged, or stolen.
- Ask for the full set: box, warranty card or papers, and any service records with dates and watchmaker details.
- Meet at a jeweler or watchmaker who can open the case, not at a food court. A five minute inspection settles most doubts.
- Check the serial against the reference. Mismatched reference and serial combinations are common on replicas.
Frequently Asked Questions
Is every IW371649 sold online a fake?
No. Genuine examples circulate on auction sites and dealer platforms, but the reference is also widely copied, so photos and seller history deserve scrutiny.
Can a jeweler tell a fake IW371649 from a photo?
Sometimes, based on dial printing and caseback engraving. A definitive answer requires the caseback off and the movement inspected in person.
Do super clones use the same movement as the original?
No. Replicas use clone or generic chronograph movements, even when the visible parts of the watch look close to the genuine piece.
Bottom Line
A fake IW371649 can look convincing in a listing photo. It rarely survives a loupe, a scale, and an open caseback. Verify the reference number against official IWC information, compare the case and dial details against known good examples, and let a watchmaker confirm the movement before any money changes hands.