The IW371621 is a reference in IWC's Portugieser Chronograph family, and replica versions of it circulate widely on auction sites and social marketplaces. A well-made replica can match the 41 mm case, the dial layout with the chronograph minutes at 12 and the running seconds at 6, and even the strap stitching. What it cannot match is the in-house Calibre 69355 movement, the reference engraving between the lugs, and the case finishing visible under a loupe.
What is the IWC Portugieser Chronograph IW371621?
The IW371621 belongs to the current-generation Portugieser Chronograph line, which IWC refreshed around 2020 with an in-house movement. The design keeps the clean, rail-track dial that made the model a staple of the collection since the late 1990s. Reference-level details such as dial color, case metal and strap should always be confirmed against IWC's own catalog, because the IW3716 family spans many combinations.
Key specifications at a glance
- Case diameter: 41 mm, height around 13.1 mm
- Movement: IWC Calibre 69355, automatic, in-house
- Power reserve: roughly 46 hours
- Frequency: 4 Hz (28,800 vph)
- Water resistance: 3 bar (about 30 m)
- Crystal: sapphire, antireflective coating on both sides
- Caseback: sapphire display back
How can you tell a replica IW371621 from a genuine one?
The fastest check is the movement, and the second fastest is the caseback. Replicas usually fail on one of those two points even when the dial looks convincing in photos.
1. Look at the movement through the caseback
The genuine Calibre 69355 is a column-wheel chronograph with clean Geneva stripes, blued screws and crisp engraving on the rotor. Replicas typically use an Asian 7750-derived clone with a cam-actuated chronograph, rougher finishing and a rotor engraving that looks stamped rather than cut. On a real watch the chronograph pushers feel light and precise; on a clone they feel stiff or gritty.
2. Read the reference engraving between the lugs
IWC engraves the reference number and serial between the lugs at 12 and 6 o'clock. The font is small, shallow and even. Replicas often engrave too deep, use the wrong spacing, or omit the serial entirely. Cross-check any serial with an IWC boutique or authorized service center.
3. Inspect dial printing and subdial finishing
Genuine applied numerals and indices sit flush with sharp, polished edges, and the subdial rings are cut, not printed. On replicas the printing tends to sit slightly thick, the subdial rings can look flat, and the hands may show a brushed finish where the original is polished.
4. Weigh the watch and check the hardware
A steel Portugieser Chronograph on leather falls in a narrow weight band, and replicas are frequently lighter because the case is thinner-walled. Check the tang or deployant buckle for crisp engraving and a firm spring action.
Why do replica IW371621 watches cost so little?
Replicas skip movement development, quality control and warranty support, and they use mass-produced clone calibres bought in volume. That is why a replica can sell for a few hundred dollars while a genuine steel Portugieser Chronograph retails in the high four figures. The savings come from the parts you cannot see.
What are the risks of buying a replica watch?
- No manufacturer warranty, and authorized service centers will decline the watch
- Seizure by customs, since counterfeit trademarked goods are prohibited imports in the US
- Water resistance that is often untested and can fail in everyday wear
- Near-zero resale value and no path to a legitimate sale
- Civil and criminal exposure for anyone reselling counterfeit goods
How do you verify a genuine IW371621 before buying?
- Ask for the warranty card, booklet and original box, and match the serial to the caseback.
- Request a short video of the chronograph starting, stopping and resetting to zero.
- Compare the asking price against current secondary market listings for the same reference.
- Have a watchmaker or IWC service center open the caseback before you pay.
- Buy from a seller with a documented return window and verifiable history.
Frequently asked questions
Is the IW371621 still in production?
IWC rotates dial and case combinations within the Portugieser Chronograph family, so availability of a specific reference changes. Confirm current status with an authorized dealer rather than relying on older listings.
How much does a genuine IW371621 cost?
Steel Portugieser Chronograph models on leather typically retail between roughly 8,000 and 9,000 US dollars, with secondary market prices tracking condition, age and completeness of the set.
Will IWC service a replica watch?
No. Authorized service centers refuse counterfeit watches, and independent watchmakers may also decline because parts are not interchangeable with the genuine calibre.
Can a replica pass as genuine in photos?
Yes, which is why remote purchases carry risk. Photos hide movement finishing, engraving depth and weight, so insist on video, macro shots of the caseback, and an inspection period.