For most buyers the best replica IW371473 to look for is a 41 mm stainless steel Portugieser Chronograph with a two-register dial, a domed sapphire crystal, and a closed steel caseback over an automatic movement. That build matches the real watch where it counts on the wrist: the diameter, the lug curve, the leaf hands, and the railway minute track. The criteria that decide whether a copy reads as convincing at arm's length are case profile, dial printing, subdial placement, hand finish, and how the movement is hidden.

What the IW371473 Is

The reference belongs to the IWC Portugieser Chronograph family, a line built around a round case, a slim bezel, applied Arabic numerals, and a printed railway minute track. The family ran through two generations. Earlier examples use a Valjoux 7750 base caliber with a two-counter display: running seconds at 6 o'clock and elapsed chronograph minutes at 12. Later examples move to an in-house caliber with the same layout on the dial. Because both generations exist, confirm which one a listing copies before you judge the small details. A dial that is correct for one generation will look wrong against the other.

  • Pros: a well-documented reference with plenty of comparison photos, a simple round case that is hard to distort, and a dial layout that forgers have had years to refine.
  • Cons: the same popularity means a large spread in quality, from careful builds to rough ones, so the photos in a listing matter more than the model name.

Case, Crystal, and Wrist Presence

The case is where a copy announces itself first. Look at the side profile: the lugs on the genuine watch curve down toward the wrist and the case band alternates brushed flanks with polished edges. A blocky, flat lug with a sharp inner corner is a giveaway under a shirt cuff. Check the crystal too. A domed sapphire with an anti-reflective coating on the inside gives the dial a faint blue or purple tint at an angle, while cheap mineral glass looks grey and dull.

  • Pros: a correctly proportioned case makes the watch wearable on a 6.5 to 7.5 inch wrist, and the slim bezel keeps the dial looking large without the watch feeling thick.
  • Cons: many copies add height at the caseback, which pushes the watch off the wrist, and some use flat sapphire that loses the soft reflection of the original.

Use case: if you wear a watch under a cuff and care mostly about how it sits, spend your attention on the case profile and the crystal, not on dial minutiae.

Dial Printing, Subdials, and Hands

Dial work is the second filter. Applied numerals should sit at a consistent height with clean edges and a polished top. The railway track is printed in fine, evenly spaced strokes. The two subdials should align on a vertical axis through the center, with the running seconds at 6 and the chronograph minutes at 12. Leaf-shaped hands need a crisp central ridge; a soft, rounded hand loses the light play that defines the original.

  • Pros: strong dial printing is the single cheapest upgrade a maker can get right, so many mid-tier copies score well here.
  • Cons: subdial spacing is set by the movement, not by the printer, so a copy that uses the wrong base caliber will show counters that sit too far apart or too close to the center.

Use case: if your friends know watches, the subdial spacing and hand shape are the two things they will see first across a table.

Movement and Caseback Options

There are two routes here and they trade off differently. A closed steel caseback hides the movement and only asks that the engraving on the back be sharp. A display caseback shows everything, so the rotor, the bridge finishing, and the engraving have to hold up under a loupe.

  • Pros of a closed caseback: nothing to inspect, less to go wrong, and the watch stays thinner. It also matches the genuine reference if the original uses solid steel.
  • Cons of a closed caseback: you cannot verify what is inside, so buy from a seller who shows movement photos before assembly.
  • Pros of a display caseback: you can see the rotor and confirm the chronograph module type.
  • Cons of a display caseback: poor finishing is visible to anyone who asks to see the back, and a wrong layout is obvious to a trained eye.

Use case: pick the closed back for daily wear and the display back only if you enjoy showing the movement and accept the extra scrutiny.

Strap, Clasp, and Finishing

The strap is often the weakest part of a replica package. Alligator-grain leather should have a soft, irregular scale pattern rather than a repeating stamped grid. Stitching should be tight and even, and the lining should feel like leather, not plastic. If the watch ships on a pin buckle, check that the tang meets the frame squarely; a deployant clasp should open and close without grit in the hinge.

  • Pros: swapping to a quality aftermarket strap is inexpensive and lifts the whole watch.
  • Cons: a stiff, glossy strap makes an otherwise good case look cheap, and a wobbly clasp is hard to repair.

Who This Replica Suits, and Who It Does Not

This copy suits someone who likes the Portugieser look, wants a chronograph for daily rotation, and accepts that a replica is a replica. It is a poor fit for anyone who needs service history, resale value, or a watch they can hand to a jeweler for regulated timing. If you plan to swim with it, skip it; chronograph pushers and unknown gasket quality do not mix with water.

Ten Minute Inspection Checklist

  1. Measure the case across the bezel and compare it to the reference figure.
  2. Look at the case side in raking light for flat lugs and harsh edges.
  3. Tilt the crystal toward a lamp and check the anti-reflective tint.
  4. Check that numerals sit level and that the 12 and 6 markers align with the subdials.
  5. Press the chronograph start, stop, and reset and confirm the hand returns to zero.
  6. Listen to the rotor with the watch held close to your ear for scraping.
  7. Inspect the caseback engraving depth and lettering thickness.
  8. Flex the strap and check the stitching and lining material.
  9. Open and close the clasp five times.
  10. Set the time and check the crown threads engage without cross-threading.

Care Notes

Keep the watch away from water unless a seller states a tested rating, and have the gaskets checked before trusting any claim. Wind and set the movement at the same time each day so you notice changes in feel, which is often the first sign a cheap movement is wearing. Store it on a soft surface so the crystal does not pick up scratches from a hard tray. A replica will not hold value, so treat it as a wearable object rather than an asset, and choose the version that fits your wrist and your routine instead of chasing the most complicated listing you can find.