The top pick: an automatic replica IW371432 built on a Valjoux 7750 base with a working two-register chronograph is the version worth your money. Quartz copies and faked-chronograph cases fail the moment anyone picks the watch up. The criteria below cover how the movement functions, how the case and dial compare to a real Portugieser Chronograph, how the bracelet or strap sits on the wrist, which tier suits which buyer, and what to confirm in photos before you pay.

What the IW371432 actually is

The reference sits in the IWC Portugieser Chronograph 3714 family: a steel case of roughly 41 mm, a thin bezel, and a two-register dial with small seconds at 6 o'clock and the chronograph minutes counter at 12. A date window sits at 3. The genuine watch runs an IWC-modified Valjoux 7750, which is why the layout reads as a bicompax instead of the usual three-register 7750 spread. Blue-dial steel versions on a matching bracelet are what most buyers picture, but IWC has shipped this reference in more than one dial and bracelet pairing, so line your seller's photos up against a real listing of the same reference number before you judge anything.

Movement: the deciding factor

Automatic, 7750-based

  • Pros: a chronograph that actually starts, stops, and resets; a small seconds hand that sweeps; the 12 and 6 subdial layout the reference calls for; real weight and a rotor you can hear.
  • Cons: the case usually runs 1 to 2 mm thicker than the genuine watch, the rotor can be louder than an IWC, and a service or repair is a bigger job than swapping a battery.

Quartz

  • Pros: lower cost, lighter on the wrist, near-perfect timekeeping, and fewer parts that can fail.
  • Cons: the small seconds hand ticks once per second, which is the first thing a watch person notices; pushers on many quartz copies move but drive nothing.

Case, bezel, and crystal

The case is where a replica shows itself at arm's length, long before anyone reads the dial.

  • Pros of the top tier: correct lug shape and curve, brushing that follows the same direction as the original, a crown that sits flush with no gap, and sapphire with anti-reflective coating applied to the inside surface.
  • Cons to expect even at the top: extra case thickness, a bezel edge that catches light a little softer, and crown action that feels lighter than an IWC.

Dial and hands

  • Pros: applied indices with sharp edges, printing that stays crisp under a loupe, subdial rings with real depth, and hands with clean, straight edges.
  • Cons: a date window cutout that looks flat, a date font that is too thin, lume that glows green instead of a warm tone, and hands that are a shade too thick or too thin.

Bracelet or strap

  • Steel bracelet, pros: matches the reference most buyers are chasing, gives the watch its heft, and hides a slightly thick case better than leather. Cons: end links that do not sit tight against the lugs, a clasp that feels stamped rather than milled, and screws that strip if you resize it at home.
  • Leather strap, pros: lower cost, easy to swap, and a good strap pulls attention away from the case. Cons: a poor strap makes an accurate case look wrong, and stock straps on replicas often arrive stiff and glossy.

Which tier fits which buyer

  • Daily wear, handled by others: automatic tier with the steel bracelet. The working chronograph and the correct subdial layout carry the watch.
  • Collection piece, worn on occasion: automatic tier on a leather strap, and put the savings into the dial and hands, since that is what people look at.
  • Knockaround travel watch: quartz is acceptable if you accept the ticking small seconds. Do not pay automatic money for it.

QC checklist before you pay

  1. Request a video, not stills, with the chronograph started, stopped, and reset to zero.
  2. Confirm the small seconds at 6 runs and the minutes counter at 12 advances when the chronograph is engaged.
  3. Check the date flips clean at midnight and sits centered in the window.
  4. Ask for a straight-on dial shot and a side profile shot so you can judge thickness and crystal dome.
  5. Ask for the lug-to-lug measurement and, if you can, a wrist shot on a known wrist size.
  6. Confirm bracelet screws, end-link fit, and clasp operation on camera.

A replica IW371432 will never be the genuine watch, and the honest goal is a convincing wrist presence, a working chronograph, and a dial that holds up close. Buy the movement first, the dial second, and the bracelet third.