What is the replica IW371433?
The replica IW371433 is a copy of the IWC Portugieser Chronograph reference IW371433. The real watch uses a 41mm steel case, a vertical two-register dial with running seconds at 6 and a 30-minute counter at 12, a date window at 3, and the calibre 79350 automatic movement. A copy worth buying gets four things right: case width, case thickness, sub-dial spacing, and dial print.
Most buyers come to this reference for the dial. It is large, clean, and readable, with leaf hands and a fine railway minute track. That same openness makes fakes easy to judge, because any error in printing or spacing shows at arm's length.
Why the IW371433 gets copied so often
The Portugieser Chronograph is one of the most recognizable dress chronographs on the market, and the real reference sits in a price bracket few people reach. Replica makers fill that gap. The design also reproduces at a basic level without much tooling: two sub-dials, no tachymeter, no complex bezel.
- 41mm case fits most wrists, so the copy suits a wide audience.
- Plain steel case with no gold or ceramic parts keeps production cheap.
- The vertical sub-dial layout is easy to spot when wrong, which pushes makers to improve.
- Strong demand means many factories build it, so quality varies by factory, not by model name.
Which details separate a good replica from a poor one?
Five areas decide quality. Check them in this order, because each one is harder to fake than the last.
1. Dial print and sub-dial spacing
Look at the railway track first. On a good copy the minute ticks are even, thin, and unbroken around the chapter ring. On a poor one they smear, thicken at the corners, or drift out of alignment near the sub-dials.
Then check the sub-dial centers. They should sit on a straight vertical line through the crown, with equal gaps above and below the center pinion. Text should be crisp: "IWC" and "SCHAFFHAUSEN" stacked under the 12, "AUTOMATIC" above the 6. Blurry or thick lettering is the clearest tell.
2. Case thickness and side profile
The genuine watch measures about 12.3mm thick. Many copies add 1mm to 2mm because the movement sits in a taller spacer. A thick case pushes the strap away from the wrist and makes the watch sit high on the arm.
Ask the seller for a caliper measurement with the caseback flat on a table. If the answer is vague, assume the watch is thick.
3. Crystal and anti-reflective coating
The real watch uses a sapphire crystal with coating on both faces, which gives the dial a faint blue sheen at an angle. A copy coated on one side looks flat. A copy with no coating throws hard reflections under indoor light.
4. Caseback engraving and finish
This reference has a solid caseback with engraving around the edge. Laser etching on cheap copies looks grey and shallow. Deeper engraving with sharp edges is a sign of a better build.
5. Strap, buckle, and spring bars
Most replicas ship with a stiff, glossy strap that ruins the look. Budget for a replacement in alligator-grain leather. Check the buckle engraving and the spring bar fit, since a loose bar drops the watch.
6. Movement
Two options exist: a quartz copy and an automatic copy. Quartz versions often run a fake chronograph or a frozen sub-dial, and the tell is a seconds hand that ticks once per second. Automatic copies use a Chinese chronograph movement with a smooth sweep. Expect the automatic to cost more and to need service sooner or later.
How much should a replica IW371433 cost?
Prices vary by factory and movement, so treat any single quote as a starting point. Rough ranges:
- Quartz, low grade: $60 to $120.
- Automatic, mid grade: $180 to $320.
- Automatic, high grade with a clone movement and better finishing: $350 to $650.
A price far below these bands often means a quartz movement in a heavy case. A price far above them seldom buys a better watch, only a better sales page.
What should you ask the seller before paying?
- Factory name and version number, not just "highest quality".
- Case thickness in millimeters, measured, not copied from a spec sheet.
- Movement type and whether the chronograph functions work.
- Real photos of the actual watch, with the date set to a day you choose.
- Return policy in writing, including who pays return shipping.
- Water resistance claim, and whether the caseback gasket is fitted.
How do you keep a replica IW371433 running?
- Keep it away from water. A replica caseback seal is not built to the same tolerance as the original.
- Run the chronograph for a few minutes once a month so the lubricants spread.
- Store it flat in a dry box, not on a window sill.
- Have the movement cleaned every three to five years if you wear it often.
Frequently asked questions
Is a replica IW371433 waterproof?
No. Most copies handle splashes and nothing more. Do not swim or shower with one, even if the listing claims 30m or 50m.
Can a jeweler tell it is a replica?
A watchmaker who handles the real reference will spot it in seconds by the movement, the caseback engraving, and the case thickness. On the wrist, most people see a clean steel chronograph and nothing else.
Will a genuine IWC strap fit?
Yes, in most cases, provided the lug width matches. Measure the gap between the lugs before you order any strap.
Which version suits a first-time buyer?
A mid-grade automatic with a working chronograph and a clean dial is the safest pick. It looks right, costs less than the top tier, and leaves room in the budget for a decent strap.