If you are comparing replica IW545137 listings, the top pick is a top-tier hand-wound build with a decorated movement under a display back. That is the version worth the extra money, because the IW545137 belongs to the IWC Portuguese Hand-Wound family, a time-only watch with small seconds at six and a sapphire caseback. The three criteria that separate a good build from a bad one are movement type and finishing, case proportion and lug geometry, and dial execution around the small seconds subdial.

Criterion 1: Movement Type and Finishing

The Portuguese Hand-Wound has no date and no rotor, so the back of the watch is a window onto the movement. There is nowhere to hide a wrong caliber. A correct build uses a hand-wound movement with the small seconds driven at six o'clock and bridges that are finished rather than painted.

Pros of a correct hand-wound build

  • Winding feel and crown travel match the character of a hand-wound watch.
  • No rotor blocking the view, so the display back shows balance, bridges, and jewels.
  • Small seconds hand sweeps from the correct position instead of sitting off-center.
  • Thinner profile than an automatic build, which keeps the case proportions honest.

Cons and failure points

  • Cheap builds hide a quartz module behind a decorative plate, and the seconds hand ticks.
  • Some sellers fit an automatic movement and leave the rotor visible, which is instantly wrong on this reference.
  • Faux perlage and laser-etched branding look flat under a loupe and under daylight.
  • Loud winding and a gritty crown are common on budget hand-wound clones.

Use case: if you plan to wear the watch with the back visible, or you take the strap off to show friends, buy the hand-wound build. The movement is the whole point of this reference.

Criterion 2: Case Proportion and Lugs

The Portuguese case is wide with a thin bezel and long, slim lugs. A replica that looks squat, has stubby lugs, or carries a thick slab of a caseback fails at arm's length before anyone checks the dial. Ask the seller for the case measurement and the thickness, then compare those numbers against the reference figures they list.

Pros of a well-proportioned case

  • Sits flat on the wrist and slides under a cuff.
  • Lug curve matches the strap line, so the watch does not look glued to the arm.
  • Polished case sides catch light the way the original does.

Cons of a rushed case

  • Over-polished edges round off the lug tips.
  • Caseback engraving is shallow or misspelled.
  • Thick builds wear top-heavy and tip toward the hand.

Use case: for daily wear on a leather strap, case proportion matters more than any single dial detail. It is the part everyone sees from across a room.

Criterion 3: Dial, Subdial, and Printing

The dial is clean, which makes errors easy to spot. Applied numerals and markers should sit proud of the surface with crisp edges. The small seconds subdial should be recessed with a fine concentric texture, not a flat printed disc. The minute track and the brand text should hold up in macro photos.

Pros of a strong dial

  • Applied markers throw a shadow, which reads as quality in daylight.
  • Correctly recessed subdial adds depth that flat dials lack.
  • Clean printing at the brand and the track holds up in photos.

Cons to watch for

  • Flat printed markers that look painted on.
  • Subdial ring sitting level with the main dial.
  • Heavy anti-reflective coating that turns the crystal blue or purple.
  • Leaf hands with blobby tips or rough edges.

Use case: if you take wrist shots or spend time around people who know watches, dial execution is the criterion to spend on.

Option 1: Entry-Tier Build

Pros

  • Lowest cost of the three tiers.
  • Fine for a costume or short-term wear.

Cons

  • Usually quartz or a basic automatic, so the display back gives it away.
  • Case and dial finish are visibly flat.

Use case: only for buyers who want the look for a single event and will not turn the watch over.

Option 2: Mid-Tier Automatic Build

Pros

  • Better dial finishing and a more convincing case.
  • Automatic convenience if you dislike winding.

Cons

  • The rotor is wrong for this reference and visible through the back.
  • Case is often thicker than the original.

Use case: a reasonable pick if you wear the watch face up and never show the caseback.

Option 3: Top-Tier Hand-Wound Build

Pros

  • Correct hand-wound movement with finished bridges.
  • Closest case thickness and lug shape.
  • Best dial depth and subdial detail.

Cons

  • Highest price of the three tiers.
  • Requires you to verify movement photos before paying.

Use case: the default choice for anyone treating this as a long-term watch rather than a novelty.

Red Flags and Seller Questions

  1. Ask for a timestamped photo of the actual watch, front and back, not a stock image.
  2. Ask which movement is inside and request a clear caseback photo.
  3. Ask for the case diameter and thickness in millimeters.
  4. Ask whether the crystal has coating on one side or both.
  5. Ask what happens if the watch arrives with a fault.

Note that replica watches are sold as replicas, and in the United States the import and sale of counterfeit branded goods is treated as illegal, so understand the risk before you order.

Verdict

Buy the top-tier hand-wound build. This reference rewards the movement, and the display back punishes every shortcut. If the budget will not stretch, choose the mid-tier build and accept that the caseback is a compromise, not a feature.