The strongest replica IW545179 you can buy today is the top-grade build from the factories that specialize in IWC Portugieser style cases, most often named as ZF and YLF, purchased through a dealer who agrees to send pre-shipment QC photos of the actual unit. Judge every listing against five criteria: case and lug geometry, dial printing and subdial position, movement type and winding feel, crystal and anti-reflective coating, and the payment and QC terms. If a seller cannot talk about those five things, walk away.
What reference IW545179 is, and why it matters
This reference belongs to the hand-wound Portugieser family: a round polished case, thin bezel, small seconds subdial, and applied indices or numerals depending on the variant. Confirm the exact dial layout on the genuine piece before you compare copies. Factories often build one dial and advertise it against several reference numbers, so the catalog photo you see may not match the watch in the box. If an official spec page for this exact number is hard to find, build your checklist from photos of the genuine watch on a resale site and match proportions from there.
Criterion one: case and lug geometry
- Pro: Top builds hold case thickness close to the original and keep the lugs slender with a proper downward curve, so the watch sits flat on a wrist instead of floating on top of it.
- Pro: Crown size, crown shape, and caseback engraving match closely enough that a side-by-side glance at arm's length does not give it away.
- Con: Cheaper versions run a millimeter or two thicker, which pushes the case up and makes the bezel look wide.
- Con: Lug holes drilled in the wrong spot make strap changes look off and let the spring bars sit proud of the lugs.
Recommendation: ask the dealer for a side profile photo and a measurement of case thickness before you commit. This is the single check that separates the tiers.
Criterion two: dial printing and subdial
- Pro: High-grade dials use applied indices with clean edges, and the subdial sits at the correct height so the hand stack reads correctly at a glance.
- Pro: Printing weight is light rather than heavy, and the line spacing between the brand text and the model text stays even.
- Con: Budget dials show thick printing, uneven spacing, and a subdial ring that sits too low or too high.
- Con: Lume color drifts too green on cheap dials, which shows up fast in daylight photos.
Recommendation: request a straight-on dial photo plus a macro of the subdial. Compare the subdial center point against the crown height, not against another replica photo.
Criterion three: movement and winding feel
- Pro: The better builds use a hand-wound movement with a smooth winding action and a power reserve that holds for a full day off the wrist.
- Pro: A good dealer will send a movement photo of the exact unit and a short video of the seconds hand running.
- Con: Low-grade builds hide a thin automatic movement behind a decorative plate, which feels gritty when you wind it and can run fast.
- Con: Some sellers advertise automatic stock as hand wound. Ask directly and ask for video, because this is the hardest thing to fix after the sale.
Recommendation: when the watch arrives, check the rate with a timing app over 24 hours. Small drift is normal, large drift is a return.
Criterion four: crystal, coating, and finishing
- Pro: Domed sapphire with an inner anti-reflective coating gives the faint blue tint under strong light that the genuine watch shows.
- Pro: Brushed and polished transitions on the case flanks stay sharp on the better builds.
- Con: Mineral glass or a flat crystal kills the profile, and a heavy outer coating makes the dial look milky outdoors.
- Con: Soft polishing rounds the lug edges and makes the watch look like a generic dress piece.
Recommendation: take your own photos in direct sun before deciding to keep the watch. Coating flaws only show in bright light.
Option one: trusted dealer with QC photos
- Pro: You see the actual watch rather than a stock image, and you can reject one unit and ask for another.
- Pro: Dealers handle shipping and usually reship if a parcel is seized.
- Con: Price sits above a marketplace listing, and one angle of QC photos can hide a small dial flaw.
- Con: Turnaround runs two to four weeks.
Best for: a first purchase of this reference, or any time the dial variant matters to you.
Option two: secondhand from a replica forum member
- Pro: You see real owner photos, and the sale often includes a worn-in strap and the original box.
- Pro: Prices drop once a model has been out for a year.
- Con: No QC and no returns, so you inherit any movement problem.
- Con: The seller may have swapped the crystal or strap before listing.
Best for: a buyer who already knows the exact build and can verify it from sharp photos and a timing reading.
Option three: marketplace or social media listing
- Pro: Fast, and sometimes you can meet in person.
- Con: Most listings reuse factory photos, so you never see the unit you will receive.
- Con: No recourse if the watch never ships.
Best for: nobody shopping this specific reference. Skip it.
Red flags before you pay
- Stock photos only, with no dated photo of the actual watch.
- No clear answer on movement type, or a claim that every version uses the same movement.
- Pressure to pay through an untraceable method with no order record.
- A price far below the normal range for the top-grade build.
- A seller who cannot describe the subdial position or the case thickness.
Use case recommendations
- First replica, dial variant matters: dealer with QC photos, top-grade build.
- Second copy, you know your wrist size: forum secondhand, budget for a service.
- Beater only: mid-grade build, accept the thicker case and skip the macro checks.
Final check before you commit
Confirm four things in writing: which factory built the watch, which movement is inside, how many QC photos you will receive, and what happens if the watch arrives damaged. Pay by a method that leaves a record. When the parcel lands, inspect the crystal and dial under daylight, wind it fully, and time it for a day before you decide you are done.