A replica IW371748 is a third-party copy of an IWC chronograph from the 3717 reference family, and it is judged on four things: dial printing, subdial spacing, day-date alignment, and caseback engraving. Top-tier copies sell for roughly $280 to $500 and use an Asian Valjoux 7750 clone, which matches the architecture of the genuine movement. Budget copies under $150 usually fail on at least two of those four points.
What Is the Genuine IW371748?
The 3717 block covers IWC's Pilot's Watch Chronograph line, produced mainly through the late 2000s and early 2010s before the 3777 family took over. Watches in this group share a 42 mm steel case, a soft-iron inner shield for magnetic protection, a screw-down crown, and a chronograph movement built on Valjoux 7750 architecture.
IWC lists the caliber as the 79320, a 25-jewel automatic with a 44-hour power reserve and a day-date display at 3 o'clock. The dial layout uses three subdials: running seconds at 9, a 12-hour counter at 6, and a 30-minute counter at 12.
Why Do Replica Buyers Target This Reference?
The 7750 base is the reason. Because the genuine watch uses a Valjoux-derived movement, replica makers can install an Asian 7750 clone and keep subdial positions, pusher spacing, and crown height close to the original.
That shared geometry means a top-tier copy looks convincing on the wrist from two feet away, which is not true of many other references. The remaining tells tend to be finishing details rather than overall proportions.
Replica Quality Tiers
Budget tier (under $120)
Expect single-sided anti-reflective coating, soft caseback engraving, and a day-date window that drifts left or right of center. Pushers often feel gritty and the chronograph hand may not return exactly to 12.
Mid tier ($150 to $280)
Dial printing sharpens up and the crystal gets better coating. Subdial spacing is usually correct, but lume is weak and the rotor decoration rarely matches the 79320 pattern.
Top tier ($280 to $500)
These copies use a decorated Asian 7750, double-sided AR coating, and a caseback with deep, even engraving. Strap hardware, buckle markings, and crown threads are the details worth comparing at this level.
What Should You Inspect Before Buying?
- Dial printing: text should be sharp with even letter spacing and no ink bleed.
- Subdial spacing: three registers at 6, 9, and 12 with equal gaps between them.
- Day-date alignment: both discs should center in the window and flip near midnight.
- AR coating: the crystal should suppress reflections from an angle, not only head on.
- Caseback engraving: depth and font weight matter more than the exact logo shape.
- Pusher feel: a firm click, smooth reset, and no grinding when starting the chronograph.
- Lume: an even glow that fades slowly instead of dying in ten minutes.
What Movement Is Inside a Replica IW371748?
Almost every copy runs an Asian 7750, also sold as the A7750. It is a 25-jewel automatic with roughly a 40-hour reserve and a day-date module, and it is the same family the genuine 79320 belongs to.
Service quality varies by seller, so ask whether the movement is the standard A7750 or a higher-grade version with a decorated rotor and adjusted regulation. Winding feel and chronograph reset are the quickest ways to judge the movement on arrival.
Red Flags to Avoid
- Stock photos only, with no real images of the actual watch in hand.
- Subdials pushed into the wrong positions, which signals a quartz or 21-jewel substitute.
- A day-date window with misaligned text or a font that is too thin.
- Prices far below the tier the seller claims, which usually means a lower grade shipped.
- No return window and no acceptance of payment methods that allow a dispute.
Is Buying a Replica Legal?
Counterfeit watches are illegal to sell in the United States and most of the European Union, and customs agencies seize shipments of goods that carry protected trademarks. Buyers can face confiscation and, in some jurisdictions, fines. Treat this guide as informational and check the rules where you live before ordering anything.
FAQ
How much should a good replica IW371748 cost?
Plan on $280 to $500 for a copy that gets the dial, date window, and caseback right. Anything under $120 is a different grade of watch at the same reference number.
How can I tell a top-tier copy from a cheap one?
Compare the anti-reflective coating first, then the day-date alignment, then the caseback engraving depth. Cheap copies fail at least one of those three checks.
Does the replica use a real Valjoux 7750?
No. Copies use the Asian 7750, a licensed-architecture clone. It behaves like the Swiss original but parts and finishing differ.
Is a replica IW371748 worth servicing?
Only at the top tier. A service on an A7750 typically costs $80 to $150, which makes sense for a $400 copy and rarely makes sense below that.