The best replica IW371752 runs an Asian 7750 automatic chronograph movement in a 40.9 mm stainless steel case, with running seconds at 6, chronograph minutes at 12, and a day-date window at 3. Copies that use quartz movements, drop the day-date, or measure under 12 mm thick are the low-grade builds to skip.
What Is the IW371752?
The IW371752 comes from the IWC Portugieser Chronograph family, a stainless steel automatic chronograph around 41 mm across. It uses Calibre 79350, a Valjoux 7750 base with roughly a 44-hour power reserve. Two layout features define the reference: subdials at 12 and 6, plus a day-date window at 3 o'clock.
That day-date is the hardest element for a replica factory to imitate. Font weight, window size, and print alignment on a copy are often slightly off when compared side by side with the genuine dial.
Which Movement Should a Replica IW371752 Use?
Movement choice decides everything else: case thickness, hand behavior, and how the chronograph feels at the pushers.
- Asian 7750 automatic: correct subdial layout, correct case height, working chronograph with a clean reset. This is the only tier that feels close to the genuine watch.
- Quartz with faux chronograph: thin case, subdials that step once per second or never move, and a day-date that is printed rather than functioning.
- Decorated 7750: an Asian 7750 with an engraved rotor and added stripes. The decoration is cosmetic, and rough engraving is a tell rather than a bonus.
What Dial Details Give a Copy Away?
Dial flaws show up in photographs first, which is why QC images matter more than seller descriptions.
- Day-date font and position: the day and date should sit level and centered in the window.
- Logo print: "IWC Schaffhausen" should be fine, sharp, and centered above the 12 index.
- Subdial spacing: a wide gap between 12 and 6 often signals a quartz base.
- Hands: leaf-shaped hands with clean edges, and a chronograph seconds hand that reaches the minute track.
Case, Crystal, and Caseback Checks
The case should mix brushed flanks with a polished bezel and lugs, and the edges should feel sharp rather than rounded off. Crystal quality separates tiers: sapphire with a light blue or purple anti-reflective tint beats a harsh green cast or cloudy plastic. On the back, engraving depth, reference markings, and the crown logo should be crisp.
What Do Replica IW371752 Grades Cost?
Entry copies with quartz movements sell for about $80 to $150. Mid-tier builds with an Asian 7750 and decent finishing land near $200 to $350. High-grade builds with corrected dials, sapphire, and a timed 7750 climb past $400.
Price alone is not proof of quality. A $400 listing with a 10 mm case and a dead day-date is still a bad watch.
How Do You Vet a Seller Before Buying?
- Ask for timestamped photos of the exact watch, not catalog images.
- Confirm the movement in writing, including the automatic 7750 and the working day-date.
- Check how long the seller has been active and whether past buyers posted QC photos.
- Request the return policy in writing before payment.
- Pay with a method that offers dispute protection.
QC Photo Checklist for the Replica IW371752
- Front shot with the time set to 10:10 so both subdials and the day-date are visible.
- Close-up of the day-date window at 3, checking font and alignment.
- Side profile to confirm the case is about 12 mm thick, not 10.
- Caseback photo for engraving depth and reference markings.
- Timing reading on a timegrapher, ideally within plus or minus 10 seconds a day.
- Video of the chronograph start, stop, and reset to prove the pushers work.
Is a Replica IW371752 Worth Buying?
Only the automatic 7750 tier is worth the money. Quartz copies look wrong in profile and often fail within a year, which erases any savings.
Can a Replica IW371752 Pass as Genuine?
No. Movement finishing, engraving, and dial print differ under close inspection. A good copy reads correctly from arm's length, and that is the realistic standard.
Does the Replica Keep the Day-Date at 3?
Quality builds do. Cheap builds print a static date, shift the window, or remove it altogether.
Before You Buy
Replicas are unauthorized copies of a trademarked design, and buying or selling them is illegal in many countries. Treat this guide as a way to judge build quality and identify counterfeits, not as a promise of authenticity or legality.